User`s guide

26
User's Guide Fireface 400 © RME
12. Hotline – Troubleshooting
The newest information can always be found on our website www.rme-audio.com, section FAQ,
Latest Additions.
The input signal cannot be monitored in real-time
• ASIO Direct Monitoring has not been enabled, and/or monitoring has been disabled globally.
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 and is now fed from the SPDIF output. The ADAT playback devices are still us-
able by routing and mixing them in TotalMix 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 400 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 ‘Settings’ dialog or 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’.
• Check the Settings dialog for displayed Errors.
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 FireWire transmission performance. Therefore, defective FireWire cables with
limited transmission bandwidth can cause such an error scheme.