User Manual

User's Guide Fireface 802 © RME
27
12. Hotline – Troubleshooting
The newest information can always be found on our website www.rme-audio.com, section FAQ,
Latest Additions.
The 8 ADAT channels don’t seem to work
• The optical output ADAT2 has been switched to AES/SPDIF. As can be seen in the block
diagram, chapter 36.1, all channels and their assignments still exist, but the optical transmit-
ter has been disconnected from ADAT2 and is now fed from the AES output (channels
13/14). The ADAT2 playback devices are still usable 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 802 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. The same is true for USB
cables.