Velodyne | DIGITAL DRIVE SMS-1 | User`s manual | Velodyne DIGITAL DRIVE SMS-1 User`s manual

Digital Drive
SMS™- 1
F e a t u r i n g S o f t w a r e Ve r s i o n 2 . 1
Digital Drive User’s Manual
At t e n t i o n !
Digital Drive User’s Manual
Vo r s i c h t !
Digital Drive User’s Manual
At t e n z i o n e !
Digital Drive User’s Manual
Ta b l e o f C o n t e n t s
Congratulations ...................................................................................................1
Before you Begin .................................................................................................1
Package Contents ................................................................................................2
Product Features and Controls ..............................................................................2
- SMS-1 ..........................................................................................................2
- Remote Control ..............................................................................................3
- Digital Drive Accessory Kit ...............................................................................5
Installation Overview .............................................................................................5
SMS-1 Controls and Ports .................................................................................5
Installation – Quick Start .......................................................................................8
Installation – Step-by-Step......................................................................................9
- SMS-1 Cable Connections ................................................................................9
- A Word About SMS-1 Outputs..........................................................................9
- A Word About Interconnect Cables .................................................................10
- A Word About Connecting more than one SMS-1..............................................10
SMS-1 Setup - OVERVIEW...................................................................................12
- Quick Setup Using Self-EQ ..............................................................................12
- ON-SCREEN Setup ........................................................................................12
Onscreen Programming and Setup – Step by Step..................................................17
Restoring Defaults .............................................................................................34
Runtime Mode ..................................................................................................35
About Room Equalization.....................................................................................38
Care of Your Digital Drive SMS-1..........................................................................38
Troubleshooting and Service ................................................................................38
Appendix A: RS-232 Serial Overview and Commands ..............................................39
Appendix B: Summary of Special Remote Codes.....................................................41
Digital Drive User’s Manual
Congratulations on your purchase of a Velodyne Digital Drive SMS-1 Subwoofer Management
System! This system enables you to bring the power of Velodyne’s patent-pending Digital Drive
bass management to any subwoofer. Digital Drive technology, universally acknowledged as the
state-of-the-art in bass reproduction, is the result of years of research and development,
combining advanced Digital Signal Processing (DSP), software, equalizer, and audio filter
technologies. The result is a product that provides levels of bass management for non-DD
subwoofers previously unattainable.
This exceptional product will provide you with years of unparalleled listening pleasure. Enjoy!
B e f o r e yo u b e g i n
Please observe the following instructions to insure safe and proper system operation.
To prevent fire or shock hazard, do not expose this equipment to rain or moisture. To avoid
electrical shock, do not open the chassis cover. Please observe all warnings on the equipment
itself. There are no user serviceable parts inside. Please refer all service questions to your
authorized Velodyne dealer.
Prior to installation
Please unpack the system carefully! Remove all staples if used to seal the carton as they can
scratch the chassis. Please save the carton and all packaging materials for future use.
Packing this unit in any other carton may result in damage when shipping. Please take a
moment to record the serial number and date/location of purchase in the space provided on
the warranty card for future reference or register on-line at
NOTE: Be sure to check the Velodyne website at for updates to the
SMS-1 software and/or this manual.
This SMS-1 has electronics built into the cabinet. Do not place the cabinet next to
sources of heat such as furnace registers, radiators, etc. Do not place the unit near
sources of excessive moisture, such as evaporative coolers, humidifiers, etc. The power
cord should be routed in such a way that it will not be walked on, pinched, or
compressed in any way that could result in damaging the insulation or wire.
Digital Drive User’s Manual
Pa c k a g e C o n t e n t s
Your Velodyne Digital Drive SMS-1 consists of the following components:
Digital Drive SMS-1
Power Supply with Cord
Remote control
Digital Drive Accessory Kit
CAUTION: Many of the accessories are embedded in the included foam endcaps. Please
do not discard.
Product Features and Controls
Prominent features of your new Digital Drive SMS-1 include:
• Front panel display indicating volume, preset, and operating modes
(auto-EQ, mute, night mode)
• Control for up to three subwoofers
• Balanced (XLR) input
• Line-level (RCA) inputs and thruputs
• Speaker-level inputs
• Fixed 80Hz high-pass crossover (RCA output)
• Variable volume control
• Detachable 6-foot power supply
• Included rack mount ears
• On-screen controls:
- Auto-EQ
- Graphic or Parametric Equalizer controls for room EQ
- Adjustable (15Hz – 199Hz) low-pass crossover (defeatable)
- Multiple staggered low-pass crossovers (6dB/octave, initial to 48dB/octave, ultimate)
- Adjustable (15Hz - 35Hz) subsonic filter (defeatable)
- Multiple staggered subsonic filters (12dB/octave, initial to 48dB/octave, ultimate)
- Variable volume control
- Adjustable phase control (0° - 180° in 15° increments)
- Selectable polarity (+/-)
- 12 Volt trigger (defeatable)
- 6 presets for customized listening modes and EQ defeat
- Selectable default preset
- Switchable LCD light
- Night Mode maximum volume setting
- Save settings indicator
- Daisy chain feature
Digital Drive User’s Manual
Remote Control
The Velodyne Digital Drive infrared remote control allows you to set up, adjust, and reset your
SMS-1 when connected to a television or a video monitor. You will also use your remote to
activate preset listening values, set the SMS-1’s volume up or down, mute the SMS-1, or set
a night operational mode.
Take care not to lose or misplace your remote control as adjustments to the SMS-1 (with the
exception of volume control) can only be done using the remote.
NOTE: Two 1.5V AA batteries are required and included for operation of the
remote control.
Digital Drive User’s Manual
Remote Control Buttons
A brief description of each button on the remote control follows:
• PWR – Causes the SMS-1 to stand by.
• NUMERIC KEYPAD – Used to enter an
unlock code to enter SETUP mode, and for
other functions.
• SET (+/-) – Increases or decreases the Q value
for a parametric EQ, or sets values on the
• LIGHT – Turns the SMS-1’s LCD light on or off.
• NIGHT – Limits the peak output of the SMS-1,
and illuminates the NIGHT indicator on the
LCD screen.
• VOL (+/-) – Raises or lowers the volume of
your SMS-1 as indicated on the LCD display.
• MUTE – Mutes and unmutes the SMS-1.
• TEST – Used to toggle between the SYSTEM
screen during setup.
• EXIT – To exit SETUP mode. The unit will ask
if you want to save settings before exiting.
• SELECT - To toggle field values.
• RESET – Used to reset volume to the last saved
setting on the main screen, and to defeat
crossovers on the settings screen.
• MENU – Enters SETUP mode from the
introductory screen.
• PRESETS – To access the five presets and one
EQ defeat listening modes. Initially set at the
factory, they are fully user adjustable. The
front panel LCD indicates which preset you
have selected.
Figure 1: Velodyne Digital Drive remote control
Digital Drive User’s Manual
Digital Drive Accessory Kit
The Velodyne Digital Drive Accessory Kit contains the following six components:
Calibrated precision microphone
Microphone windscreen cover
Tabletop microphone stand
Microphone stand adapter
6 foot audio cable
6 foot video cable
20-foot XLR microphone cable
I n s ta l l a t i o n O v e r v i e w
Your new Velodyne SMS-1 provides for a number of installation options. Read all the installation
information below in order to determine which installation option is best for your system.
Remember to perform all installation procedures with SMS-1 unplugged until instructed
to activate it!
SMS-1 Controls and Ports
The Velodyne Digital Drive SMS-1 is set up, configured, and adjusted by the controls, inputs,
and connections located on the rear panel of the unit. Figure 1 shows the location of each of
these important operational interfaces. Brief descriptions of each interface follow.
Digital Drive User’s Manual
Figure 2: Digital Drive Front and Rear Panel Connections
POWER – Press the POWER switch to the ON position to activate the SMS-1. If the
unit is to be left unused for an extended period of time, press the switch to the OFF
position to prolong the life of the SMS-1.
IR Remote Sensor.
LCD Display – This display shows subwoofer volume, preset, and indicates auto-EQ,
self- EQ, mute, and night mode operation.
MIC INPUT – This XLR input jack is for the XLR microphone cable.
VOLUME UP/DOWN – Press the black UP pushbutton to incrementally raise your
SMS-1’s system volume; press the black DOWN pushbutton to incrementally
Note the use of these buttons during
lower your SMS-1’s system volume.
software updates.
XLR OUTPUT – This balanced connector sends the conditioned subwoofer audio
signal to your subwoofer.
LFE INPUT – This XLR input jack receives the LFE signal from your receiver
or processor.
MIC INPUT – This XLR input jack is for the XLR microphone cable.
IR REMOTE – This connection allows for hook-up of an IR signal from a repeater or
other similar device.
Digital Drive User’s Manual
RS-232 OUT – Use this port to communicate with a second “daisy-chained” Digital
Drive SMS-1.
RS-232 IN – Use this port to communicate with your computer (for software
updates), a touch panel remote control, or another upstream Digital Drive SMS-1.
See Appendix A for an explanation of the use of the serial port, available commands,
and their formats.
EQ Video Output – Used to display the video generated by the SMS-1. S-Video or
composite connections are available. A composite video cable is included. NOTE:
Only connect to a single video output at a time.
LFE OUTPUT – These connectors send the conditioned subwoofer audio signal to up
to three subwoofers.
EQ OUTPUT LEFT/RIGHT – Connect the audio cable from your accessory kit to these
jacks: white plug to LEFT, and red plug to RIGHT.
THRU – These RCA connectors are for sharing the same signal that goes into your
SMS-1 with a second “daisy-chained” SMS-1 or other device. Unaltered line-level
signal comes out of the THRU jack.
OUTPUT – These RCA connectors incorporate the use of an 80Hz 6 dB/octave slope
high pass crossover.
INPUT LFE – These RCA input jacks are for line-level connection.
12V TRIGGER/SPEAKER LEVEL INPUT RIGHT/LEFT – If the 12 volt trigger mode is
active, 12 volts is required across these pins for power to be activated. The speakerlevel connector allows for connection with exposed speaker wire.
12V DC POWER SUPPLY INPUT - Connect the power supply to this jack.
Digital Drive User’s Manual
I n s ta l l a t i o n – Q u i c k S ta r t
To quickly set up and take advantage of the auto-EQ feature in your new Digital Drive SMS-1,
perform the following steps:
Unpack the SMS-1 and connect the power cable.
Connect an LFE input cable from your receiver/processor to the input jack.
For other hookup options, see step 2 on page 9.
Connect a high quality line level cable from one of the LFE out jacks to your subwoofer.
Disable your subwoofer’s crossover if possible, and set its volume to one-quarter up to
one-half setting.
Power up the unit and ensure that it is receiving and processing signal from your
receiver (i.e. your subwoofer is playing bass).
Connect the microphone (found in the accessory kit) to the XLR mic input jack on the
front or rear panel of the SMS-1 and place the mic in your favorite listening position.
Press 3-2-1 on the remote.
The subwoofer should emit 25 “sweep” tones then restart and play normally. NOTE: If
you have the video connected you will see the sweep screen with Self-EQ mode
indicated. This screen will show the EQ adjustments as they happen.
Adjust the SMS-1’s volume and your subwoofer’s volume to taste.
10. Enjoy your room-equalized sub!
Digital Drive User’s Manual
I n s ta l l a t i o n – S t e p - B y - S t e p
To ensure a quick and flawless installation of your Velodyne Digital Drive SMS-1, follow these
setup instructions.
SMS-1 Cable Connections
Make all necessary cable connections between the applicable SMS-1 connector port and your
particular home electronics equipment in the following order:
1. Insert the detachable power supply into the power interface port on the rear panel of your
SMS-1. Plug the male end of the cord into a convenient wall outlet.
2. Provide signal to your SMS-1 through one or more of the following connections (refer to your
receiver/processor owner’s manual for available inputs to the SMS-1):
a. LFE INPUT (RCA, the RED jack at location 17 on Figure 1) – This is the most common
input cable connection. Make a connection between this input and the LFE output of
your receiver or processor; OR
b. LFE INPUT (XLR, location 7 on Figure 1) – Make a connection between this input and
the balanced LFE outputs of your receiver or processor; OR
c. INPUT, LEFT and RIGHT (location 17 on Figure 2)– Make a connection between these
inputs and the stereo outputs of your receiver or processor; OR
d. SPEAKER-LEVEL INPUT (location 18 on Figure 2) - Make a connection between these
inputs and the left and right speaker connections on your receiver or processor.
Make this connection by inserting speaker wire into the correct terminals of the
terminal block.
3. Establish the return line-level connection (optional). Connect to a pre-amplifier’s main outputs
and return them to your amplifier inputs. When installed in this fashion, your satellite
speakers will be crossed over at 80Hz, which removes the lower bass from your amplifier
and speakers, enabling them to do a better job reproducing high frequencies. By utilizing
this method, you will have a bi-amplified system, gaining improved power and headroom for
your system.
NOTE: To bypass the 80Hz crossover described in step 3, use the THRU output jacks instead
of the OUTPUT jacks.
A word about SMS-1 outputs
The Velodyne SMS-1 is designed to operate using the full range audio signal for input when using
the digital built-in crossover. Most processors/receivers have a “subwoofer out” or LFE jack
that is internally filtered and designed to be used with a conventional amplifier and speaker. In
some rare cases, combining both an external crossover and the one internal to the SMS-1 may
result in low output and increased noise. In these installations you may need to bypass the
internal crossover in either the processor or Velodyne SMS-1. In some installations, simply
setting one crossover to a higher frequency (such as 120Hz) will restore maximum
performance. To bypass the SMS-1’s internal crossover when the unit is being fed a low pass
signal from another crossover, refer to the SETUP instructions at step 14, below.
Note: If not using an external crossover, you should use the built-in crossover for
optimal performance.
Digital Drive User’s Manual
4. Connect the audio/video cables between your SMS-1 (EQ OUTPUT VIDEO/LEFT/RIGHT –
yellow, white, and red respectively) and your electronics (receiver, processor, TV, etc.). Insert
the color-coded cable plugs into the correct EQ OUTPUT receptacle – the yellow plug into the
VIDEO jack, the white plug into the LEFT jack, and the red plug into the RIGHT jack. The
opposite ends of the cables should be connected to your receiver/processor. The yellow
VIDEO cable goes to an available composite video input (e.g. aux), and the white/red AUDIO
(L&R) cables go to a corresponding audio input. As an alternative to composite video, you
may want to use S-video (S-video connector not included). Connect the S-video from the
SMS-1 to an S-video compatible input on either your processor or TV. Consult your
receiver/processor and/or TV owner’s manual for more information.
5. Connect your subwoofer(s) to the SMS-1 using the XLR connector or LFE out RCA connector.
6. Defeat the crossover on your subwoofer(s) (if possible) and set its volume to the
middle setting.
NOTE: Make sure the audio output goes into your AUDIO system, not your TV! The SMS-1 will
generate test tones used to match the SMS-1 to your satellites and to correct for room
anomalies that need to be played by your main audio system.
7. Insert the XLR microphone cable’s 3-pin male plug into the MIC INPUT jack (location 7 on
Figure 2) on the front or back panel of the SMS-1.
8. Slide the microphone (male connector end first) down through the open, circular sleeve of
the tabletop microphone stand. Position this assembly at a desired listening position.
NOTE: The Digital Drive Accessory Kit includes a microphone stand adapter (1/2”-27 thread)
for use with professional mounting stands. Be sure to first remove the inner thread piece
(3/8”-16) before using.
9. Connect the XLR microphone cable’s female jack end with the male connector end of the
10. Sheath the microphone pickup with the foam windscreen cover as a protection against dirt
and airborne contaminants.
A Word About Interconnect Cables
When installing your new Velodyne SMS-1 using the line level connections, you should always
use shielded phono cables. There are many quality cables available today, most any of which
will work perfectly well. We do recommend that you keep the length of cable as short as
possible to avoid any potential noise problems.
A Word About Connecting more than one SMS-1
Note that your SMS-1 can control up to three subwoofers. Each of the three subwoofers will
receive the same conditioned signal from the SMS-1. If you wish to run more then three
subwoofers, or wish to individually customize the signal to different subwoofers, you will need
more than one SMS-1 connected in a “daisy-chain” configuration. This section describes setup
in a daisy-chain configuration.
Digital Drive User’s Manual
Choose one SMS-1 for all the connections described below (we’ll call this the “master”), and
then connect an RCA jack from the THRU RCA jacks of the “primary” to the Input jacks of the
“slave.” You will also need to obtain a “Mouse Extension” serial cable (available at any computer
store, from your Authorized Velodyne dealer, or from Velodyne directly) and connect the RS232
OUT port of the primary SMS-1 to the RS-232 IN port of the secondary SMS-1. Then, all
runtime commands directed at the primary SMS-1 (such as select preset, volume, etc.) will be
communicated to the secondary SMS-1 automatically through the serial cable. If you have more
than two SMS-1s in your setup, simply continue the daisy chain from the secondary SMS-1 to
the next SMS-1 in the line (using both RCA and serial connections) and so on.
NOTE: When an SMS-1 detects an incoming RS-232 command, it reverts to “Slave Mode.”
This means that the SMS-1 will no longer accept IR commands. To reestablish normal
operations, disconnect the RS-232 cable and power cycle the unit.
Note that the daisy chain connection ONLY allows the woofers to communicate basic “run-time”
commands such as volume and preset. We recommend the following sequence when setting
up daisy-chained SMS-1s.
1. First, connect only the master SMS-1/subwoofer(s) to the system. Do not connect the thru
or serial cables at this time.
2. Establish the crossover, phase, and other settings EXCEPT the EQ on the master SMS1/subwoofer(s) (see setup steps 1 – 17 below). Note the low pass crossover, phase and
polarity settings, then save.
3. Connect the video out of the slave SMS-1/subwoofer(s), go to the settings screen, establish
the low pass crossover, slope, phase, polarity, and night mode settings from the master
SMS-1, then save settings.
4. Connect the microphone to the slave SMS-1/subwoofer(s) and use the “self-EQ” feature
(described below) to establish room EQ for that SMS-1.
5. Repeat steps 3 and 4 for each slave SMS-1/subwoofer(s) in your system.
6. Reconnect the video out to the master SMS-1/subwoofer(s), and reconnect the thru and
serial cables so that the master and slave SMS-1(s) are daisy chained.
7. EQ the primary SMS-1/subwoofer(s) (see steps 8-25). Self-EQ is NOT recommended for the
primary SMS-1/subwoofer(s).
8. Setup is complete!
Digital Drive User’s Manual
SMS-1 Setup – Ov ervie w
BEFORE YOU BEGIN: Once the installation has been completed, note that you can use your SMS1 without performing ANY of the setup steps below. Simply use the remote to set the volume,
and select the preset that most closely matches your listening material, and enjoy! However,
to reap the maximum benefits of Digital Drive technology, read on!
Special note for 230V users with video problems
For 230-volt Digital Drive SMS-1 users, the default video mode is NTSC video format. If your
TV is NTSC compatible, you will have no trouble with this mode. However, certain TVs
(especially older ones) may require PAL or SECAM video. To switch from NTSC to PAL/SECAM
mode, press the DOWN ARROW four times followed by RESET. The SMS-1 will restart in
PAL/SECAM video mode. To revert back to NTSC, restore defaults by pressing 8-9-0 on the
cover screen.
Quick Setup Using Self-EQ
To perform an abbreviated setup of your Digital Drive SMS-1 using the Self-EQ function, position
the microphone in your listening position and connect it to the SMS-1 as shown in the installation
instructions. Then, press 3-2-1 on the remote. The subwoofer emits 25 “sweep tones” that are
detected by the microphone and used to automatically EQ your SMS-1 accordingly. After the
sweep tones are completed, the unit automatically saves settings and returns to normal operation.
Once the self-EQ process starts, pressing the RESET button can interrupt it.
Caution: Self-EQ resets all EQs for all presets to their default values. DO NOT use the Self-EQ
feature after you have adjusted the SMS-1 EQs manually as described below.
This section describes adjusting the onscreen settings of your SMS-1. You will be performing
all the setup functions using the buttons of your Velodyne-supplied remote control and seeing
the results on your TV screen. Words in all uppercase letters in the setup instructions (e.g.,
SELECT, MENU, etc.) identify the specific remote button to be pressed or selected, or the field
on the screen you should be paying attention to. Remember to point the remote control at the
SMS-1, not your TV!
Use the UP, DOWN, RIGHT, and LEFT directional arrow buttons that surround SELECT to
navigate the fields of the setup screens. Settings are typically changed using the SELECT key,
followed by the UP and DOWN arrow keys. Alternatively, the SET +/- buttons can be used to
change settings. A screen field highlighted in reverse video indicates your current location on
the screen. Holding down the UP, DOWN, RIGHT, or LEFT arrow keys causes the remote to
repeat and you can then rapidly move through fields to arrive at the desired one. You should
be able to perform most of the setup process by using the four arrow keys and the
SELECT button.
WARNING: The SMS-1 is a device that manipulates your subwoofer’s input audio signal before
passing it along to the subwoofer to play. There are tools and controls on the SMS-1 that allow
you to send signals to your subwoofer that your subwoofer may not be able to handle. Many
subwoofers contain self-protection but even this might not be enough to handle certain
conditioned signals. Use caution when setting subsonic filters, EQs, volume levels, and other
settings so that you do not send signals to your subwoofer that cause it harm. Areas of
particular concern will be highlighted throughout the setup instructions.
Digital Drive User’s Manual
NOTE: Velodyne is not responsible for damage caused to subwoofers as a result of normal use
and setup of the SMS-1.
Following is an overview of the screens you will be using to set up your Velodyne Digital Drive
Figure 3: Introductory Screen
See Figure 3. This the Introductory screen. Notice that as you change settings (such as
preset, volume, etc.) they are shown on this screen.
You enter setup mode by pressing MENU and entering the code 12345. Upon successful entry
of this code, the system takes you to the EQ Setup screen, as shown in Figure 4.
HINT: You do not need to press MENU to begin entering the setup code. You can begin the
12345 sequence by pressing the number 1 on the remote.
Digital Drive User’s Manual
Figure 4: EQ Setup screen
The EQ Setup screen includes a “SYSTEM RESPONSE” “sweep” window and a graphic equalizer.
You use these settings to equalize your room. The graphic equalizer features 8 bands, each of
which can be used at its current frequency, or can be infinitely adjusted to the frequency and
Q you desire. Each preset can have its own EQ settings.
Digital Drive User’s Manual
By navigating the cursor to the NEXT field and pressing SELECT, the following screen appears:
Figure 5: SYSTEM SETTINGS Screen
From this screen the crossover, subsonic filter, phase, polarity, volume, and other settings can
be set, as well as specifics for each preset, if desired.
Your SMS-1 comes with 6 presets, four of which are preprogrammed at the factory. The Setup
setting is used to initially set the crossovers, slopes, phase, polarity, and volume for all presets.
Then, each preset can be individually adjusted if desired. The presets are as follows (they are
also labeled on the remote):
Custom (off from the factory, or flat)
EQ Defeat
Digital Drive User’s Manual
All six presets contain the following fields:
• Low Pass Crossover Frequency and Slope – Adjust the upper limit of your SMS-1’s
frequency response. Select a crossover setting, in increments of 1, between 15 Hz and
199 Hz (or OFF) and slope at 6, 12, 18, 24, 30, 36, 42 and 48 dB/octave.
• Subsonic Filter Frequency and Slope – Set your SMS-1’s subsonic filter (low frequency
limit), in increments of 1, between 15 Hz – 35 Hz and slope at 6, 12, 18, 24, and 48
• Phase – Set the phase (delay) of the SMS-1’s output signal, 0 to 180 degrees (adjustable
in 15 degree increments).
• Polarity – Set your SMS-1’s polarity by toggling between positive (+) or negative (-). This
in effect reverses the phase 180 degrees.
• Volume – Each preset can have its own volume separate from the master volume shown
in the setup column. When the master volume changes, the preset volume changes in
lock step.
• Contour Frequency – This allows you to set a frequency to boost or cut the signal to your
SMS-1 in response to specific types of source material. These have been preset at the
factory according to the presets above, but any or all can be customized to taste.
• Contour Level – This indicates the amount of boost or cut at the frequency specified in
the contour frequency. Again, this has been preset at the factory but can be adjusted
to taste.
Other controls on the Setting Setup Screen:
• 12 Volt Trigger Mode – When active, this control automatically shuts the SMS-1 off until
12 volts is detected via the connector at position 18 on the back panel.
• Night Mode Maximum Volume – When the NIGHT mode button is pressed on the
remote, this setting is invoked. Night mode is indicated on the LCD display. The SMS-1
will not play louder than this volume level until the night mode is defeated.
Digital Drive User’s Manual
Onscreen Progr amming and Setup– Step-by-Step
The following steps take you though a typical SMS-1 setup procedure.
1. Push the POWER button on the SMS-1’s front panel to activate the unit.
2. Make sure your receiver/processor is on and the volume control is set to minimum.
3. If you haven’t already done so, establish the crossover settings for your main speakers.
Generally, if your mains can be crossed over at 80 Hz (that is, accurately reproduce
frequencies to this level) it is an ideal setting. However, some satellite speakers are only flat
to 120 Hz or even higher. Remember that the higher the SMS-1 is crossed over (to match
the satellite crossover settings), the more likely it is to become directional (that is, you can
tell where the bass is coming from). Again, consult your processor and speakers owner’s
manuals for more information.
4. Select the source on your receiver/processor that the DD SMS-1 audio output is connected
to. Input should be configured for stereo.
5. Set the video input where you connected the video output as the active TV image. The
introductory screen with the Velodyne logo and “Velodyne Digital Drive” should now appear
on your TV screen, as follows:
Digital Drive User’s Manual
6. Press MENU and enter 12345 to enter the EQ setup screen, as follows:
Digital Drive User’s Manual
Upon pressing 5, you should see the following screen:
7. Use the remote control to MUTE the SMS-1.
Digital Drive User’s Manual
8. Raise the volume on your receiver/processor until the DD test sweep (a tone that sweeps
from 20 Hz up to 200 Hz) can be heard from your system’s speakers. Continue to raise
the volume until the “SYSTEM RESPONSE” graph on your TV shows the response of your full
range speakers (the right hand portion of the graph) at approximately 86 dB (or a
comfortable listening level). This is shown below:
9. Now use the DD remote control to unmute the SMS-1, then use the volume up and down
keys to match the level of the SMS-1 to your full range speakers. That is, the “SYSTEM
RESPONSE” graph should be relatively flat (although at this point there will be peaks and
valleys that will be addressed next).
NOTE: You may also need to adjust the volume of your subwoofer to achieve a good match.
Make sure that the SMS-1’s volume is not too low – it may require experimentaion to find the
proper balance between SMS-1 volume and your subwoofer’s volume.
Digital Drive User’s Manual
The screen should now look something like this:
Digital Drive User’s Manual
About Room Placement
Room placement is the first step in equalizing your subwoofer(s) to your main speakers and your
room. Subwoofers operate at extremely low frequencies, which are primarily omni-directional
(that is, you can’t usually tell where they are coming from). Placing the subwoofer(s) in the
room is a trial and-error process which is greatly aided by the SMS-1. The goal is to find the
best location(s) that result in the minimum number and severity of valleys in the frequency
response curve. This is because peaks in the response curve are easy to address with an EQ,
but valleys typically are not easily fixed because they represent a cancellation of frequencies that
more power to that frequency will usually not fix.
As a general rule, placing the sub(s) in the corner(s) of a room will add to the overall amount
of bass the subwoofer produces, but that bass may not necessarily be as low in distortion
compared to a position away from the corner. The worst location for a subwoofer is typically
far away from any walls, and close to the center of your room. Avoid these locations when
possible. When using a pair of subwoofers in stereo, it is preferable to place each subwoofer
by the satellite of the same channel. If moving your satellites is an option, they too can
contribute to peaks and valleys and should be likewise placed through experimentation.
Now you can begin moving your subwoofer(s) around the room to find the best placement
position. You need to find the best tradeoff between appearance and room response. Be sure
the room is in the configuration that it will be in when you typically listen – e.g. doors closed,
curtains open or closed, etc. As you move the SMS-1, refer to the “SYSTEM RESPONSE” graph
to minimize peaks and especially valleys in the response curve. As an example, you might find
a location that smoothes the graph as follows:
Digital Drive User’s Manual
TIP: Here’s an easy way to find the optimal position for your subwoofer without moving it to
multiple positions in the room. Start by setting the subwoofer up in your listening position.
Now, move the microphone around the room and observe the response graphs for different
room positions. The best position has the fewest valleys and the overall smoothest response.
NOTE: If you are constrained in room location positions, don’t worry! By following the setup
steps below, Digital Drive bass management gives you lots of flexibility to make the most out of
any subwoofer placement position.
11. Now that the room location has been chosen, turn off the SMS-1 and the rest of your
system, permanently route the wiring, and reconnect to your SMS-1.
12. Reactivate the SMS-1 and your system and ensure that the system works as before.
13. Use the MENU button to get to the EQ setup screen (after entering the 12345 code), and
then position the cursor over the NEXT field on the EQ setup screen. Press SELECT, and
observe the SYSTEM SETTINGS screen, as follows:
You are now ready to adjust the crossover, subsonic filter, volume, and phase controls of your
NOTE: if the remote seems intermittent or unresponsive, be sure you are pointing it at the
SMS-1 and not your TV!
Digital Drive User’s Manual
AND REMEMBER: Use the UP, DOWN, RIGHT and LEFT directional arrow buttons that
surround SELECT to move through the fields of the setup screen, and change settings by using
the SELECT button, then the UP and DOWN arrow keys. Or, you can skip the SELECT button
and change values using the SET +/- buttons.
14. When setting the low pass crossover, begin by setting the frequency and slope to the same
values as the crossover settings on your receiver/processor (for example, many units have
a large/small satellite setting). Again, consult your receiver/processor owner’s manual for
more information. You will notice that changing these values “cascades” the values out to
all the presets. That is because once these values are set, they will not normally change
from preset to preset, but if later you wish to customize a specific preset you can. An
example of a crossover changed to 100 Hz is shown below:
Digital Drive User’s Manual
TIP: To see immediate feedback on the effects of your changes to the “SYSTEM RESPONSE”
graph, press the TEST button. The following screen appears:
Press TEST again to return to the SYSTEM SETTINGS screen.
NOTE: Some receivers/processors supply a signal that is already crossed over – i.e. just the
bass frequencies. If this is the case, you will want to defeat the SMS-1’s low pass crossover.
To defeat the low pass crossover, press the SELECT key, then the RESET key. OFF appears
in all the low pass crossover and low pass slope fields.
NOTE: Your goal in setting the low pass crossover is to make the crossover point (the point at
which the subwoofer meets the main speakers in terms of frequency) as smooth as
possible. Another big factor in smoothing this point in the curve is phase, discussed in step
17, below.
15. Now adjust the low pass crossover slope. This setting is shipped at 24 dB/octave – a
fairly steep slope to prevent the subwoofer from playing upper frequencies that might call
attention to it during normal operation. At this stage, set the crossover settings under the
column entitled SETUP. Reduce the slope if necessary and use the TEST button to return
to the EQ setup screen and observe the “SYSTEM RESPONSE” graph – it should be as flat
as possible at the crossover frequency and immediately to the left and right of it. Too
gradual a slope (e.g. 6 dB/octave) may produce a bump at the crossover frequency, and
too steep a slope may produce a dip.
Digital Drive User’s Manual
16. You should normally not need to adjust the subsonic filter. Do so only if there are anomalies
in the very lowest frequencies that you cannot address using the normal EQ process as
described below.
17. Next adjust the phase and polarity settings. Phase is in effect a short delay in the
reproduction of the audio signal. The polarity reverses the phase (i.e. 180o shift).
Adjusting phase can change the dynamics of standing waves and frequency cancellations
in the room. Sometimes it may be useful to adjust the phase if there is a particularly
difficult peak or valley to eliminate, and/or your room placement options are limited. Phase
and polarity are also important tools to match your subwoofer to your main speakers. You
will often see a dip or peak in the crossover frequency between your subwoofer and main
speakers. Rather than correcting this dip with an EQ, try adjusting the phase and polarity
settings. It is very common for the main speakers to interact with the subwoofer to
diminish or accent frequencies near the crossover point (since this is the point where both
the subwoofer and the speakers are playing the same audio information). Don’t be afraid
to experiment to find the perfect match between your subwoofer and main speakers!
NOTE: The following step shows using the graphic equalizer (using fixed frequencies and Q) to
equalize the room.
18. Next, return to the EQ setup screen and adjust the graphical EQs to eliminate peaks and
valleys from the room response. Use the right and left arrow keys to position the cursor
over the EQ you wish to adjust. If you see a peak in the response at, say, 25 Hz (this would
be evident in the “SYSTEM RESPONSE” graph), simply navigate the cursor to the EQ that
corresponds to 25Hz and use the up or down arrow keys to “slide” the EQ up or down. An
example of this is shown below:
Digital Drive User’s Manual
Continue this process until the “SYSTEM RESPONSE” graph shows a +/– 3 dB response across
the bass frequencies (that is, up to about 120 Hz.). Note that this does not necessarily mean
a “ruler flat” response; +/- 3dB is typical for an optimized response curve.
An “equalized” room is shown below:
Digital Drive User’s Manual
To have the unit EQ itself, select the auto EQ option, as shown:
When this mode is selected, the unit automatically resets all EQs to their original frequencies,
and Q settings (but retains any level changes you may have made). The AUTO EQ proceeds
until you either save settings, press SELECT to return to manual EQ, move the cursor off the
AUTO EQ field (in which case the field automatically reverts to MANUAL), or twenty five sweeps
have occurred.
NOTE: The following steps use the parametric equalizer to achieve room equalization. If you do
not wish to use the parametric EQ feature, skip to step 24.
Digital Drive User’s Manual
21. To use the parametric EQ feature, position the cursor over the EQ and press the SELECT
button. The values for that particular EQ appear on the right hand side of the screen. The
following screen is shown:
Digital Drive User’s Manual
22. To manipulate a parametric EQ, you can now use the LEFT and RIGHT arrow keys to move
the frequency up and down, and the SET + and SET – keys to change the Q value. Use the
UP and DOWN arrow keys to adjust the level of the EQ as before. A selected EQ that has
been moved, with its level raised and Q adjusted is shown below:
CAUTION: Using this feature could pose a danger to your subwoofer! It is possible to “stack”
EQs - that is, setting them to identical or similar frequencies and boosting the signal at that
frequency. Some users have configured their EQs to stack EQs at the lowest frequencies, such
as 15 – 20 Hz, thus increasing the bass output of the subwoofer. The SMS-1 will deliver this
signal directly to the subwoofer, and without adequate overdrive protection this could cause
damage to the subwoofer even at normal playback levels.
23. To unselect the EQ, press SELECT again, then use the right and left arrow keys to position
the cursor on another EQ if desired, and repeat step 22, until the room is equalized.
24. Once the room has been equalized, you may want to return to the SYSTEM SETTINGS
screen (by positioning the cursor over the NEXT field on the EQ setup screen and pressing
SELECT) and review/modify the presets. This step is required ONLY if you wish to
customize the presets. Before doing this, LOCK the Setup column by positioning the cursor
over the LOCK screen and pressing SELECT.
Digital Drive User’s Manual
You can change any value in the presets column, then use the TEST key to review the curve
with these settings active. This is shown below.
Features of each preset are:
EQ. There can be a completely different set of EQs for each preset. Simply select the
preset you want on the “SYSTEM RESPONSE” screen where indicated.
Volume. This setting deviates the preset’s volume from the established system volume
of the SMS-1. So, if you found during setup that 30 was a good setup volume for the
SMS-1, then if you increased the volume for preset one to 40, the 40 volume would be
invoked when preset one were selected for listening. If the system volume is changed
(using the VOL + or VOL – keys on the remote), the preset volume is adjusted in lock step
with the system volume.
Crossover, subsonic filter, phase and polarity settings. Normally these will not
change from preset to preset. However, it may be that you are using different satellites
for different listening modes and wish to set these settings individually for a specific
preset. Note that the “setup” values cascade to the individual values for the presets, but
you can change all the individual values if desired.
Contour frequency and level. These act as an “extra” EQ that can be used to
manipulate the frequency contour of your SMS-1 when this particular preset is invoked.
For example, notice that preset one raises the level by 3 dB at 35Hz – this is to
accommodate action/adventure movie content.
Digital Drive User’s Manual
EQ Curves. Each preset can have its own unique set of EQ settings. You can select
which preset you want to EQ by either positioning the cursor on a preset column on the
settings screen then pressing TEST, or by selecting the preset you want on the SYSTEM
RESPONSE screen at the PRESET field, or by pressing one of the preset buttons on the
You will note that presets 1-4 are shipped from the factory with predetermined settings, preset
5’s contour is set at 0 level from the factory and customizable by the user (i.e. flat), and preset
6 defeats all the EQs to demonstrat the effect the equalization of the SMS-1 has on
room response.
NOTE: you can select which preset is invoked at system startup by selecting it as shown:
24. As a final thought on matching your subwoofer to your room, don’t forget the “objective
listening” test. That is, make sure the subwoofer sounds good to you! Often, you may want
to add a bit more bass than what would normally be considered “flat” even after you remove
the major peaks and valleys to achieve a flat frequency response. This is quite normal
because human hearing “rolls off” rapidly below 100Hz, causing the bass not to sound as
loud. This is the basis for the “loudness contour” switch included on many receivers and
preamps. In order for the bass to sound flat, especially at lower levels, you may need to
increase the SMS-1 volume in relation to the satellite speakers. An increase of about 5-8
dB is usually adequate. There are three methods to accomplish this:
1. Raise the internal volume control for the LFE out in your surround receiver or
processor, or,
Digital Drive User’s Manual
2. Raise the volume of the SMS-1 after you have finished your room equalization and
other settings.
You can observe this difference by watching the “SYSTEM
RESPONSE” graph as you raise the volume, or,
3. Raise the volume on your subwoofer.
Of course, all hearing is different, so be sure to perform the above step “to taste.”
25. Your setup is complete! You are now ready to save settings. You can press the EXIT button
on the remote, or position the cursor over the SAVE/EXIT field on the screen and press
select. The system responds with the following screen:
By pressing the SELECT button, you tell the system to save your settings and return to the
introduction screen. Selecting NO returns without saving (i.e. whatever previous settings were
in effect will be used), and CANCEL keeps you in setup mode.
When the unit saves settings, you will see the video flicker and you may hear a slight tick in your
main speakers. This is normal behavior.
NOTE: The Digital Drive SMS-1 stores all of its settings in internal “Flash” memory. This memory
persists even if the SMS-1 is turned off, loses power, or undergoes a programming update, so
you need not worry about losing your customized settings.
Digital Drive User’s Manual
R e s t o r i n g D e fa u l t s
There is a feature in the SMS-1 that allows you to restore the factory defaults. On the main
screen, simply press the 8, 9, and 0 buttons in sequence. After the sequence has been
entered, the unit will flicker the video and then restore the main screen. The restoration of
defaults is denoted on the main screen, as follows:
Digital Drive User’s Manual
Runtime Mode
During normal use of your Digital Drive SMS-1, you can use the preset buttons to invoke certain
presets, use the volume control to raise or lower the SMS-1’s volume, use the light and night
buttons to control the light and night mode, respectively, and use the mute button to mute the
SMS-1. These settings are shown on the introductory screen, as follows:
NOTE: If you change the volume on your Digital Drive SMS-1 but later wish to return to the
volume you established during setup (that is, as of your last save), press the RESET button.
Digital Drive User’s Manual
1 2 V O LT T R I G G E R M O D E
The following screens show the use of the 12 volt trigger mode. The following screen denotes
how to activate the 12 volt trigger feature:
Digital Drive User’s Manual
The following screen is shown when the unit is waiting for a 12 volt trigger to activate:
Digital Drive User’s Manual
About Room Equalization
This section gives some background on room equalization. As a subwoofer plays in a room, the
reflections of the sound waves off the walls create “standing waves,” that is, places in the room
where certain frequencies are louder and others are diminished. In addition to standing waves,
every room will also have locations where cancellations of the sound waves are like black holes
that no amount of attenuation can fill. Thus as a general rule it is better to “cut down” a peak of
response rather than to “boost up” a valley (i.e. possible black hole) of response.
In general, you are looking for a frequency response that is +/– 3 dB at all frequencies (it is highly
doubtful that your ears can tell a response that is any better than this). The response will always
roll off at the low end (according to the settings of the subsonic filter), and there should be no dip
or peak at the crossover frequency with the satellites. While the goal is perfectly flat response,
this may not be possible in the higher frequencies of the subwoofer’s response due to peaks or
valleys introduced by the satellites.
C a r e o f Yo u r D i g i ta l D r i v e S M S - 1
Do not use any harsh detergents or chemicals to clean the chassis. Abrasives, detergents, or
cleaning solutions may damage the finish on the chassis. We recommend using a damp cloth to
clean the chassis. During normal conditions, your new SMS-1 may be left on continuously without
any problems. If you plan to leave the SMS-1 unused for an extended period of time, we
recommend that you unplug the unit.
T roubleshooting and Service
If you should experience a problem with the operation of your SMS-1, please check all of the
following before seeking service. Following is a simple troubleshooting guide to assist you.
1. Verify unit is plugged in and power outlet used is active.
2. Is the unit receiving an input signal from your source? A good way to test this is to
connect the EQ audio out to the LFE input on the back panel, then enter setup mode (see
Step 6). The woofer should play the sweep tone used for room EQ.
3. Have all controls on SMS-1 (volume, crossover, phase, etc.) been properly set?
The following conditions require service by a qualified technician:
1. The power supply or cord has become damaged.
2. The unit does not appear to operate normally or exhibits a marked change in
3. The unit has been exposed to water.
4. Some part of the chassis or circuitry is physically damaged.
Software Updates
At the heart of Digital Drive functionality is the customized software. From time to time, Velodyne
will publish updates to the Digital Drive software. To determine if your unit is a candidate for a
software upgrade, observe the software version number in the upper left corner of the Main
Screen (e.g. V2.1). Then visit and observe the version number of the software
available for download. If this version is higher than the version in your unit, you may want to
upgrade the software.
To upgrade the software, you will need an IBM-compatible PC with an available RS-232 9-pin serial
port, and a male-to-female “Mouse Extension” serial cable. This cable is available from any
computer store, your local Velodyne dealer, or directly from Velodyne. Next, proceed to the
Velodyne web site and click on the link to download the software. Upon download, run the software
and it will instruct you on completing the update process.
Thank you for purchasing a Velodyne!
Digital Drive User’s Manual
Appendix A: RS-232 Serial Overview and Commands
This document outlines Velodyne’s Digital Drive (DD) RS-232 protocol specification. This
protocol indicates how Digital Drive products receive run-time commands from devices such as
Creston Universal Remote Controls.
Com Port Setup
Use standard communications settings: Baud Rate: 9600, Data Bits: 7, Parity: None,
Stop Bits:1
DD IN and OUT Port Pin Configuration
DD serial ports use a standard configuration that allows direct connection to a PC via a FEMALE
to MALE serial cable. It uses only 3 pins (Transmit, Receive, Ground).
The pin configurations are:
Pin 2 = Transmit
Pin 3 = Receive
Pin 5 = Ground
Pin 2 = Receive
Pin 3 = Transmit
Pin 5 = Ground
Runtime Command Format
Byte Number
Byte Description
Header Character
1 to 3 or 4
Command and
Parameter Data
3 to 4 ASCII characters see formats below
Case sensitive - CAPS ONLY!
4 or 5
Termination Character (required or
command is ignored)
Digital Drive User’s Manual
RS232 Commands
n Values
Volume Control
00 – 99
Sets volume to a value,
increments volume up
or down, or requests
current volume setting
Preset Control
1, 2, 3, 4,
5, 6
#PS1$, #PS2$,
#PS3$, #PS4$,
#PS5$, #PS6$,
Activates the indicated
preset, or requests
the current preset
Logo Light
0: Light Off
1: Light On
Turns the Logo Light
on or off, or requests
light state
Night Mode
0: Night
Mode Off
1: Night
Mode On
Night Mode, or
requests light
mode state
Mute Control
0: Mute Off
1: Mute On
Mutes/Unmutes the
woofer, or requests
mute state
Power Control
0: Power Off
1: Power On
Powers On/Powers
Off the woofer, or
requests power state
Digital Drive User’s Manual
Appendix B: Summary of Special Remote Codes
Following are special remote codes and their functions. Unless otherwise noted, the codes are
active only on the cover page.
Initiates Self-EQ feature.
Be sure to connect the
microphone before engaging.
Press RESET to cancel
prematurely. After 25 sweeps,
the unit saves and resets.
Restore defaults
Restores defaults and
resets the SMS-1.
Switch to
4 times followed
The unit restarts in
PAL/SECAM video mode.
TO restore NTSC mode,
restore defaults.
Display serial number
UP ARROW 4 times
Shows the serial number
of the unit at the top
of the screen.
Restore last saved
If volume is changed,
restores last
saved volume.
Digital Drive User’s Manual
Other velodyne Products:
Digital Drive Signature 1812 ™
HGS-X Series
SPL-R Series
DPS Series
DLS-R Series
VRP Series
VX Series
VELODYNE ACOUSTICS, Inc. (“VELODYNE”) warrants all powered subwoofers for a period of two years and full range
speakers for a period of five years. All VELODYNE products have a warranty from the date of purchase against
defects in materials and workmanship subject to the following conditions:
VELODYNE is not responsible for defects which result from the use of an amplifier or controller other than
the one originally supplied with the unit (subwoofer) or defects which result from modifications or repairs
made by any component of the system by anyone other than a VELODYNE factory authorized
service representative.
This warranty is void if any repairs or service covered by the terms of this warranty are made to any
component of the system by anyone other than a VELODYNE factory authorized service representative.
VELODYNE is not responsible for damage caused by accidents, abuse, misuse, natural or personal disaster
or unauthorized modification. The VELODYNE products are not intended for professional or commercial use
and VELODYNE is not responsible for damage resulting from such use.
The VELODYNE product warranty is limited to units that are purchased from authorized VELODYNE dealers
and finalized within authorized dealer locations.
This warranty is nontransferable under any condition.
Information regarding service may be obtained from the dealer from whom you purchased the unit, or by contacting
VELODYNE customer service. Warranty service must be performed by a VELODYNE factory authorized service
representative within the warranty period set forth above. If VELODYNE determines the unit is defective, VELODYNE
will, at VELODYNE’s option, repair or replace the product at no charge if the product is forwarded prepaid to a factory
authorized service representative. Products forwarded to the factory authorized service representative should be
shipped securely and properly packaged, insured and freight prepaid.
Digital Drive User’s Manual
Velodyne Acoustics, Inc.
345 Digital Drive
Morgan Hill, CA 95037
408.465.2800 voice
408.779.9227 fax
408.779.9208 service fax
Service E-mail:
Product E-mail:
Technical E-mail:
63-SMS1 RevD 22AUG05
Digital Drive User’s Manual
Download PDF