User Manual

36
User's Guide Fireface UC © RME
20. Hotline – Troubleshooting
The newest information can always be found on our website www.rme-audio.com, section FAQ,
latest Additions.
Important: Check that the correct (PC = Windows, AP = Mac) firmware is loaded by a double-
click on the rotary encoder.
The unit and drivers have been installed correctly, but playback does not work:
• Is Fireface UC listed in the System Profiler? (Vendor ID 2613).
• Has Fireface been selected as current playback device in the audio application?
The 8 ADAT channels don’t seem to work
• The optical output has been switched to 'SPDIF'. As can be seen in the block diagram, all
channels and their assignments still exist, but the optical transmitter has been disconnected
from ADAT. The ADAT playback devices are still usable by routing and mixing them in To-
talMix to other outputs.
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 Fireface UC has been selected as recording device in the audio applica-
tion.
• 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’.
Possible causes for a Fireface not working
• The USB cable is not, or not correctly inserted into the socket
• No power. After switching the Fireface on, at least the red Host error LED has to be lit.
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.
After the flash process the Fireface UC does not start correctly
• Pushing the rotary encoder while switching on the unit will load the Safety BIOS. The flash
process should then be repeated, maybe even on a different computer.