Operating
System
Symptom Cause Remedy
Windows
MacOS
Linux
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:
support@m2tech.biz
Windows
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:
support@m2tech.biz
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
n.a.
My DAC doesn’t lock the S/PDIF signal
out from the hiFace
The wrong input is selected on the DAC
Select the DAC’s input to which the hiFace is
connected
n.a.
My DAC always indicates 44.1kHz or
48kHz no matter the sampling frequency
of the files being played
The hiFace does not encode the sampling
frequency information in the channel
status bits included in the S/PDIF
stream
No solution: anyway, M2Tech grants that the hiFace
doesn’t perform sampling rate conversion, thus the
effective sampling frequency of the output signal
from the DAC is that set by the player or by the
operating system
MacOS
My DAC always indicates a certain
sampling frequency no matter the
sampling frequency of the files being
played
The sampling frequency is set by the
computer’s operating system through
audio settings and the player is not able
to modify it
Use a player able to interact with system settings
(Amarra, PureMusic, Decibel etc.)
Windows
My DAC always indicates a certain
sampling frequency no matter the
sampling frequency of the files being
played
Direct Sound mode is being used and the
output sampling frequency is set by the
operating system through the audio
setting in the control panel
Use a mode supporting bit-perfect operation:
WASAPI or KS
USB cable is damaged or
loose
Move the hiFace to another port
Windows
MacOS
Linux
The hiFace suddenly and unexpectedly
disappears from the system
hiFace’s USB connector is damaged Ask technical support for repair
n.a.
I can’t listen to files with certain sampling
frequencies (typically 176.4kHz and
192kHz)
The DAC doesn’t handle the highest
sampling frequencies
change DAC or set the computer’s (or player,
whenever possible) output sampling frequency to
the highest handled by your DAC
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