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User's Guide Fireface 400
© RME
33
17. Hotline – Troubleshooting
17.1 General
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 systems’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’.
•
Increase the buffer size of the hard disk cache.
•
Activate Busmaster mode for the hard disks.
•
In case of a recently done BIOS update of the motherboard: Propably 'Load BIOS Defaults'
was loaded instead of 'Load Setup Defaults'. This sets the 'PCI Latency Timer' to 0 (default:
32).
•
Check the Settings dialog for displayed Errors.
Low Latency ASIO operation under Windows 2000/XP on single CPU systems:
•
To use ASIO at lowest latencies under Windows 2000/XP even when only having one CPU,
the system performance has to be optimized for background tasks. Go to Control
Panel/System/Advanced/Performance Options. Change the default 'Applications' to 'Back-
ground tasks'. The lowest usable latency will drop from 23 ms to around 3 ms.
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.
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Страница 37: ...User s Guide Fireface 400 RME 37 User s Guide Fireface 400 Mac OS X Installation and Operation ...
Страница 51: ...User s Guide Fireface 400 RME 51 User s Guide Fireface 400 Stand Alone Operation Connections and TotalMix ...
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Страница 87: ...User s Guide Fireface 400 RME 87 User s Guide Fireface 400 Technical Reference ...
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