hiFace RCA & hiFace BNC

hiFace RCA & hiFace BNC
hiFace RCA & hiFace BNC
Official Troubleshooting
Rev. 1.0 – March 25th, 2013
When I launch the driver installation
A wrong driver or a driver with wrong
Download the right driver and version for your
version has been downloaded
operating system
program I get an error message saying that
the driver is not compatible with the
Use setup32 for 32-bit systems and setup64 for 64-bit
The wrong setup has been launched
operating system in use on my PC
When I launch the driver installation
program I get the following error
message: Impossible to complete the
Extract all files from the compressed folder into a
Setup program has been launched straight
guided peripheral driver installation. The
temporary folder and launch the setup from the
from the compressed folder
drivers designed for this computer can’t
be found. Please contact your dealer of the
administrator to check the program
Electrical communication problems due
Detach and re-connect the device, try another USB
When connecting the device to my PC I get
to the USB connector or extended, or to
port. On desktop PC’s, use one of the back panel
the message: Unknown Peripheral
a wrong insertion of the connector
ports which ensure better performance
Detach the hiFace from the USB port and restart the
When I connect the device, nothing
Electrical problem of frozen system
computer; once the boot is completed connect the
hiFace again
Download the right version for your operating system
and install it; then, the computer should complete
the installation automatically. Shouldn’t the
When I connect the hiFace, I get the
The driver was not previously installed or
computer automatically search for the driver, go to
message: device driver installation failed
the installation didn’t succeeded.
Control Panel -> Devices Management, right-click
on USB-SPDIF device and select Update Driver
When connecting the device, after installing
the driver the system freezes and all USB
management is blocked
The system has recognized the peripheral,
but when I try to access it I get an error
The chosen USB port is handled by a
non-compatible 3.0 USB controller
Check for updates for the USB controller of update
the operating system to Windows 8 or later, finally
try to re-connect the device
Reboot the computer and connect the device to a
USB 2.0 port
The USB port or controller to which the
device is connected may be USB 1.1
Connect the device to a USB 2.0 port and retry
The sampling frequency of the file being
played is not handled by the hiFace (eg.
32kHz, 64kHz or 352.8kHz)
The file is not stereo
Mac OSx
When connecting the device, it doesn’t
appear in the available audio outputs list
Driver is not installed or negotiation
Mac OSx
After a system update I have problems, the
device is no longer recognized
The system update process has damaged
the driver
When listening with FooBar, I sometimes
hear clicks
Buffer too small
Often, when skipping tracks or when
exiting pause, I hear loud clicks
USB cable too long
It’s a hiFace typical behaviour related to
buffers management
The driver is not up to date
During listening I hear clicks continuously
Use (if available) the sampling rate conversion
feature of the player or set a fixed output sampling
frequency, amongst those handled by the hiFace, in
the system preferences
Select a playback mode which includes remix, e.g.
Direct Sound
Install the driver, choosing the right version for your
Mac’s operating system
Detach and re-connect the device
Execute a disk permissions Verify and Repair from
Utility-->Disk Utility. Then, reinstall the driver
checking for the right latest version from M2Tech
website www.m2tech.biz
Increase buffer size from Foobar’s Preferences
Window, “Output” item
Try a shorter USB cable
Some players are less exposed to the problem (e.g.:
Winamp, Jriver Media Center under Windows): use
one of them
Install the most recent version downloading it from
USB cable too long
Try a shorter USB cable
An EMI source is present in proximitiy to Find out the EMI source and switch it off or move it
the hiFace and the computer
Often, in place of music I get a strong hiss
(WARNING: this only applies to the first
100 units sold between September and
October 2009)
The firmware is not up to date
Contact the technical support for the necessary
firmware update, sending an e-mail to:
[email protected]
When I try to use the hiFace on my PC with
AMD chipset, it always crashes or freezes
The firmware is not up to date
Contact the technical support for the necessary
firmware update, sending an e-mail to:
[email protected]
hiFace S/PDIF signal is too high (1.7Vpp
instead of 0,5Vpp) and saturates the
DAC’s input
Place a 75 Ohm pad plug with at least 9-12dB
between hiFace’s output and DAC’s input
My DAC doesn’t lock the S/PDIF signal
out from the hiFace
Select the DAC’s input to which the hiFace is
No solution: anyway, M2Tech grants that the hiFace
The hiFace does not encode the sampling
My DAC always indicates 44.1kHz or
doesn’t perform sampling rate conversion, thus the
frequency information in the channel
48kHz no matter the sampling frequency
effective sampling frequency of the output signal
status bits included in the S/PDIF
of the files being played
from the DAC is that set by the player or by the
operating system
My DAC always indicates a certain
The sampling frequency is set by the
Use a player able to interact with system settings
sampling frequency no matter the
computer’s operating system through
sampling frequency of the files being
audio settings and the player is not able
(Amarra, PureMusic, Decibel etc.)
to modify it
My DAC always indicates a certain
Direct Sound mode is being used and the
Use a mode supporting bit-perfect operation:
sampling frequency no matter the
output sampling frequency is set by the
sampling frequency of the files being
operating system through the audio
setting in the control panel
The computer’s USB cable is damaged or
The hiFace suddenly and unexpectedly
Move the hiFace to another port
disappears from the system
hiFace’s USB connector is damaged
Ask technical support for repair
I can’t listen to files with certain sampling
change DAC or set the computer’s (or player,
The DAC doesn’t handle the highest
frequencies (typically 176.4kHz and
whenever possible) output sampling frequency to
sampling frequencies
the highest handled by your DAC
The wrong input is selected on the DAC
The digital interconnect between the
hiFace and the DAC is too long or is too
Use a shorter digital interconnect or a better one
After shutting the computer down with the
hiFace connected, on the following reboot The USB handshake procedure timed out
the computer doesn’t see the hiFace
The hiFace is not selected as predefined
output device for the used player
The hiFace is either not connected to the
DAC or the selected input on the DAC
When I press play on the player I can’t hear
is not the one to which the hiFace is
any sound
The hifi system is off or its volume is set
to the minimum or the preamp selected
input is not the one to which the DAC is
Detach and re-connect the hiFace to the computer
Set hiFace as output device in the player’s or
system’s settings
Connect the hiFace to the DAC and select the right
Switch the system on, select the right input and set
the volume to the desired level
Frequently Asked Questions
Q: Is the USB interface in the hiFace asynchronous?
A: Yes it is.
Q: Does the hiFace complies to USB 2.0 Audio Class standard?
A: No, it uses a proprietary transfer protocol.
Q: Is it possible to use the hiFace without driver?
A: No: due to the proprietary protocol developed by M2Tech and used to transfer audio data from the computer to the hiFace, it is always necessary to
use one of the drivers supplied by M2Tech on her website for the specific product.
Q: May I use the hiFace with my old computer provided with USB 1.1 ports only?
A: No, the hiFace won’t probably either be recognized by the system, or i twill be recognized and an error message will be produced as soon as it will
be accessed.
Q: May I connect the hiFace to a USB 3.0 port?
A: It depends on the operating system: with Windows 8 or later, Linux and MAC OSx you may, while an unresolved bug in Windows 7 and earlier
leads to system lock-up.
Q: May I connect the hiFace to my iPad?
A: No, because iOS has no driver to handle it.
Q: May I connect the hiFace to an Android tablet?
A: No: while the Linux driver exists, no official porting to Android is available.
Q: Is it possible to use hiFace to transfer compressed multi-channel data (AC3, DTS)?
A: Theoretically it is, provided a bit-perfect transfer mode (Kernel Streaming or WASAPI under Windows) is used. Anyway, the results also depends
on how the recipient of data (audio/video receiver, multi-channel DAC) detects multi-channel data: as the hiFace doesn’t encode the related
information in the channel status bits, whereas the recipient use channel status information to detect multi-channel, then the connection won’t work.
Q: Is it possible to transfer DSD with the hiFace?
A: Sure, provided DSD is DoP (DSD over PCM) encoded and a bit-perfect transfer mode is selected ( Kernel Streaming or WASAPI under
Q: Is it possible to transfer 32-bit data with the hiFace?
A: No: S/PDIF standard only allows for transferring 24-bit data at most. Selecting 32-bit format on the player doesn’t imply that all bits in a sample are
delivered to the recipient: actually, the 8 least significant bits in each sample are ignored.
Q: Is it possible to use more than one hiFace on the same computer?
A: Yes it is. The only drawback is that all hiFaces will be exposed with the same name in the list of audio peripherals, thus it will be difficult to tell one
from the other.
Q: Does the hiFace perform sampling frequency conversion?
A: No, it doesn’t.
Q: I’m listening to a file with a certain sampling frequency and my DAC is displaying another frequency value, I’m sure my player is not doing
sampling frequency conversion, nor is the operating system doing it: what does it mean?
A: It’s likely that the DAC the hiFace is connected to uses the channel status information to detect the sampling frequency of the incoming signal. As
the hiFace doesn’t encode these information, the DAC is fooled in detecting the wrong sampling frequency. But if you hear music, this means that the
DAC is correctly converting the right sampling frequency.
Q: Does the hiFace transfer data at 352.8kHz or 384kHz?
A: No, it doesn’t: S/PDIF standard used for hiFace’s output is limited to 192kHz.
Q: Does the hiFace transfer data at 32kHz or 64kHz?
A: No, it doesn’t: the internal crystal oscillators stock doesn’t include these sampling frequencies.
Q: Is it possible to set the hiFace volume by hardware?
A: No it isn’t. In fact, the related control in the Control Panel is greyed out. In case this doesn’t happen, this means that the volume control is
implemented in software by the operating system.
Q: Is hiFace also shipped with BNC out connector?
A: Yes it is.
Q: Is hiFace also shipped with XLR out connector?
A: No, it isn’t.
Q: Is hiFace also shipped with optical out connector?
A: No, it isn’t.
Q: Is hiFace also shipped with I2S output?
A: No it isn’t, whoever needs this connection format may purchase the hiFace Evo, which is provided with it.
Q: Which one’s best: RCA or BNC?
A: BNC is marginally better than RCA. This is due to the fact that using 75 Ohms connectors and BNC-terminated cables it is possible to make
connections which are perfectly matched to S/PDIF standard impedance (which happens to be 75 Ohms). On the other hand, no 75 Ohms male
connectors are available (while one female 75 Ohms connector is availavle, which is not used in the hiFace), so RCA-terminated digital interconnectes
are not really 75-Ohms matched (the wire itself it is, connectors aren’t), thus the connection is not perfectly matched. This leads to signal reflections
which, in turn, cause ringing and jitter.
Q: I own a DAC with RCA S/PDIF input: does it make sense to try to use a BNC hiFace anyway?
A: In this case a slight improvement over the RCA hiFace can be obtained, provided a mixed termination interconnect (RCA on one side and BNC on
the other side) is used.
Q: I own DAC with RCA (BNC) input, a BNC (RCA) hiFace and an RCA-terminated interconnect: may I use an RCA-BNC adaptor to connect the
two devices?
A: It is possible but not advisable: adaptors are generally poor quality toys. Best is to mod the interconnect by replacing one RCA connector with a 75
Ohms BNC one.
Q: Is it possible to use the hiFace to send digital audio data from a CD player or other digital source to a computer?
A: No, as the hiFace is an output-only device. The inverse feature is provided by the S/PDIF input in the Joplin ADC.
Q: Is it possible to use an USB extender to connect the hiFace to a computer?
A: Yes, provided the extender is no longer than 2-3m and it is compliant to USB 2,0. With longer extenders operation is not guaranteed.
Q: Is it possible to use an active USB extender to connect the hiFace to a computer?
A: Yes, provided it is USB 2.0 compliant. Anyway, the operation success also depends on the specific tool used and is not guaranteed “a priori”.
Q: IS it possible to connect the hiFace to a USB hub?
A: Yes, provided it is USB 2.0 compliant. Anyway, the operation success also depends on the specific tool used and is not guaranteed “a priori”.
Q: How long a cable can the hiFace drive?
A: It depends on the cable, we know of successful connections on 8m long cables.
Q: Is it convenient to power the hiFace with a separate power supply for USB devices?
A: Yes, but the hiFace correct operation is not guaranteed, so a check before purchasing the power supply is strongly suggested.
Q: May I connect the hiFace directly to the analog input of my preamp?
A: No, you need to use a DAC, or you may connect the hiFace to a digital input of an audio/video receiver/decoder.
Q: May I connect the hiFace to the S/PDIF output of a CD player to listen to a computer though it?
A: No, it makes no sense to connect an output to another output. Anyway, some CD player are also provided with a digital input: this case it is possible
to connect the hiFace to such an input to use CD player’s internal DAC to convert digital data provided by the hiFace.
Q: May I connect two DAC’s to the same hiFace using a “Y” splitter?
A: No, because impedance matching is disrupted and the quality of S/PDIF signal is highly lowered, wasting the advantage of using the hiFace. If
strictly necessary, a special RF impedance corrected splitter which keeps the 75 Ohms matching at all terminations must be used. This case a level loss
(at least 50%) is seen, but being the hiFace output level higher than the standard, this loss doesn’t avoid the correct signal transfer to the two recipients.
Q: Which is the optimal setup for a player to use the hiFace at its best?
A: No universal setup exists for all players, setup must be judged for each player.
Q: May I use the hiFace on a Mac with Audirvana in Direct Mode?
A: No, OSX drivers are presently not compatible with this mode.
Q: May I use the hiFace on a Mac in Integer Mode?
A: No, OSX drivers are presently not compatible with this mode.
Q: Which is the best operation mode fo the hiFace connected to a Windows PC?
A: Best is Kernel Streaming, then WASAPI. Direct Sound mode, which must be used when listening to internet streaming, doesn’t ensures bit-perfect
transfers nor the preservation of the original quality of the musical signal.
Q: Can a poor USB connection or external EMI lower the sound quality?
A: If lowering sound quality means signal-to-noise ratio detriment or soundstage disruption, then the answer is: no. By its nature, USB carries data in
packets which may or may not be delivered. When a packet is lost, we hear a “hole” in music continuity. Otherwise, packets arrive in their integrity
and no sound detriment can be heard.
Q: May the quality of the power supply on the USB port affect the sound quality of the hiFace?
A: Sure it may, as it can affect the jitter level due to the noise injected in the hiFace’s on-board oscillators power supply.
Q: Does the USB cable quality affect the hiFace’s sound quality?
A: It’s is important that the USB cable is USB 2.0 compliant and that is not too long (up to 2-3m). USB cable with optimized structure may improbe
the connection, particularly in environments affected by EMI (USB cables carefully shielded) o when the USB power is very noisy (cables with
separation between power and data cables). Anyway, users must be aware that handmade cables theoretically conceived to “improve” hiFace or other
devices performance, not always succeed in the task.
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF