RME Audio Hammerfall HDSPe AIO, User Manual

Page: 28 / 81

28
User's Guide HDSPe AIO
© RME
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
(for example in TotalMix).
The 8 ADAT channels don’t seem to work
•
The optical output has been switched to SPDIF . The ADAT 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 HDSP system 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 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).
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 'Background
tasks'. The lowest usable latency will drop from 23 ms to around 3 ms.