Yamaha DX7 4x Expansion User Guide

Yamaha DX7 4x Expansion User Guide
Yamaha DX7 4x Expansion
User Guide
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Welcome to
DX7 4x Exp
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1: Introduction
The DX7-4X-EXP provides the following new features:
MEMORY EXPANSION

1
4x memory expansion: There are now 128 patches (what Yamaha calls "voices")
arranged in 4 banks of 32. Each patch is directly selectable by standard MIDI Patch
Change messages.
GLOBAL PARAMETERS

MIDI Transmit Channel: You can set the MIDI OUT channel from 1 to 16. (MIDI IN is
already settable in the v1.8 firmware using button Function 8).

Velocity Offset: You can add a fixed velocity amount to the notes you play. This resolves
an issues with all DX7 factory firmware versions where the upper velocity range was
difficult to achieve.
PATCH PARAMETERS

Local On/Off: You can set whether the local keyboard sounds the internal FM sound
engine (or not) for each patch.

Keyboard Split: Each patch has a settable keyboard split point allowing you to set up two
keyboard zones (lower and upper) per patch. Each zone has a different MIDI channel.

Lower Split Zone Patch Select: When selecting a patch that utilizes keyboard split, a
patch change message can be sent out automatically to set the remote patch on the
lower zone synth.
1
In this document the term "patch" is used to denote a programmed sound. For some unknown reach back
in the 80's, Yamaha called these "voices". The typical use for "voices" these days is to indicate the degree
of polyphony (how many keys you can hold down at once and get sound for).
DX7-4X-EXP
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2: Operation
NOTE: All of the new operating parameters are accessed using switch 13 in Function mode.
When function mode is selected battery voltage will be shown. This is normal.
Successive button presses on Function 13 select all the new parameters. For example here are
the default settings. Use the information below to check/set these values after installing the
upgrade.
FUNCTION CONTROL
BATTERY VOLT=3.0
FUNCTION CONTROL
Midi Trns Ch= 1
FUNCTION CONTROL
Vel OFFSET= 0
FUNCTION CONTROL
2nd CH VOICE=1
FUNCTION CONTROL
LOCAL ON
FUNCTION CONTROL
SPLIT OFF
Memory expansion
Recall that the DX7 has 32 internal patches accessed by pressing the INTERNAL button and
then one of the patch numbers 1 though 32.
The DX-4X-EXP has four banks of these to make the 128 patches:
Bank 1
Bank 2
Bank 3
Bank 4
Patches 1 to 32
Patches 1 to 32
Patches 1 to 32
Patches 1 to 32
=
=
=
=
MIDI patch numbers 1 to 32.
MIDI patch numbers 33 to 64.
MIDI patch numbers 65 to 96.
MIDI patch numbers 97 to 128.
To select a bank, start in normal mode (playing an internal patch). Press the purple OPERATOR
SELECT button and then one of the numbered buttons 1 through 4 .
The next patch selected will be from that new bank.
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When you select a patch, it's patch number (1 through 128) will be transmitted on the DX7's MIDI
OUT.
Another way to select patches is through MIDI IN. The patch numbers correspond to the patch
numbers 1 to 128 in the table above. That is, on receipt of a MIDI Program Change message on
the correct MIDI channel, the correct bank and patch will be activated.
Each bank must be saved or loaded individually using a cartridge or over MIDI.
There are a couple of things that can cause a bank change to be aborted (for example if you
pressed OPERATOR SELECT, but have not yet pressed a number):


If any switch other than 1 to 4 is pushed.
When a program change comes in from MIDI.
MIDI Transmit Channel
To select MIDI transmit channel, push switch 13 in Function mode. Using the Data slider or the
Yes/No buttons, select the MIDI OUT channel you want, channel 1 to channel 16. This is a global
parameter.
FUNCTION CONTROL
Midi Trns Ch= 1
Note: The MIDI IN channel is established via the standard DX7 Function button 8.
Velocity Offset
Pushing switch 13 again will bring up Velocity Offset. This will add a set amount to the velocity
which is produced when you play a key. This is added to both the velocity sent through MIDI and
to the internal patches played on the DX7. Patches that do not have any velocity sensitivity
programmed in will not change sound when this is adjusted.
Experiment to find the setting which is best for you. Most people will find a value from 10 to 15
suitable. This is a global parameter.
FUNCTION CONTROL
Vel OFFSET=15
Note: The range of values allowable is 0 to 63. If you raise the value higher than needed the
velocity clips at 127 (it does not roll over). If you raise it too high all you are doing is reducing the
dynamic range of the keyboard velocity. You can check using a MIDI device or software that can
display the Note On data.
Local On/Off
This allows you to use the DX7 as a MIDI controller. If local is off, the DX7 will not play what you
play on the keyboard, but all keyboard information will be transmitted through MIDI. The DX7 will
play anything which comes in the MIDI IN, provided it is on the MIDI channel the DX7 is set to.
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This setting is programmable for each voice. Remember to store this information into the voice by
doing a voice store after changing it. (Just as you have to do when changing any voice
parameter).
Keyboard Split
Allows you to set a split point on the keyboard. Above the split point all (upper) key information is
sent on the MIDI transmit channel. Below the split point all (lower) key information is sent on the
next higher MIDI channel.
To setup a split, when the display shows "Split off" (or when it shows "Split on"), push the Yes
(+1) switch.
FUNCTION CONTROL
SPLIT ON
Now the display will show "Split on" but will not show a split point. The next key depressed will be
the bottom key of the upper portion of the keyboard. the display will now show which key was
played. All key information below this point will be sent on the "second MIDI channel".
FUNCTION CONTROL
SPLIT ON C 3
This setting is programmable for each voice. Remember to store this if you change it.
Second Channel Voice (Patch) Select
This transmits a MIDI Patch Change command on the second MIDI channel automatically (the
one assigned to the lower keys in a split. This automates changing the patch on the slave synth
that is controlled by the lower half of the keyboard when split is active.
This feature is only active on patches that utilize keyboard split. This setting is programmable for
each voice. Remember to store this if you change it.
A CONFUSING EXAMPLE FROM THE ORIGINAL AUTHOR
To play a lead on the DX7 and play bass on a remote unit. Set second channel voice to the voice
you want to pay on the remote unit. Set DX7 receive channel to MIDI transmit channel. Set split
on and set split point. Set local off. Store this voice to itself to store second channel, local off,and
split information. Now each time you select this voice these settings will be recalled. Set your
remote unit receive channel to the next higher channel than the MIDI transmit channell on the
DX7. Patch MIDI cables from the DX7 MIDI out to the remote unit MIDI in and from the remote
unit MIDI through to the DX7 MIDI in. Now the remote unit should play below the split point and
the DX7 should play above the split point.
CAUTION! When setting the DX7 to the second MIDI channel make sure the second channel
voice number is the same as the voice you are selecting or the DX7 will change to the second
channel voice number. Experiment with the various settings to familiarize yourself with the
results.
Enjoy your updated DX7!
See the MTG web site for more great vintage synth and drum machine goodies.
DX7-4X-EXP
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