User Manual

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User's Guide Digiface USB © RME
19. Hotline – Troubleshooting
The unit and drivers have been installed correctly, but playback does not work:
• Is Digiface USB listed in the System Profiler?.
• Has Digiface USB been selected as current playback device in the audio application?
The 8 ADAT channels don’t seem to work
• The ADAT output has been switched to SPDIF in the Settings dialog.
Playback works, but record doesn’t:
• Check that there is a valid signal at the input. If so, the current sample frequency is dis-
played in the Settings dialog.
• Check whether the Digiface USB has been selected as recording device in the audio appli-
cation.
• Check whether the sample frequency set in the audio application (‘Recording properties’ or
similar) matches the input signal.
• Check that cables/devices have not been connected in a closed loop. If so, set the system’s
clock mode to ‘Master’.
Crackle during record or playback:
• Increase the number and size of buffers in the application.
• Try different cables (coaxial or optical) to rule out any defects here.
• Check that cables/devices have not been connected in a closed loop. If so, set the system’s
clock mode to ‘Master’.
Driver installation and Settings dialog/TotalMix work, but a playback or record is not possible
• While recognition and control of the device are low bandwidth applications, playback/record
needs the full USB transmission performance. Therefore, defective USB cables with limited
transmission bandwidth can cause such an error scheme.