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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 ADAT timecode is not in sync
The tape is formatted to 48 kHz, but played back at 44.1 kHz (Pitch). This 'Blackface'
problem cannot be solved in a satisfactory way.
ADAT timecode is running, but Cubase does not start 'Play' automatically
The input displayed in 'Sync Ref' is not in sync mode. Sync mode is essential, because
ADAT's so-called time code is really a sample position, and is therefore only valid for
synchronous audio data.
Sync is displayed (referring to the card's clock), but the incoming data is not in sync with the
sample position received at the ADAT Sync In. Then Cubase does not start. Remedy: Set
'Pref. Sync Ref' to the input corresponding to the received ADAT Sync signal.
Sync mode wasn't activated (button in the transport panel), or ASIO 2.0 has not been
chosen as the SMPTE sync source.
The input signal cannot be monitored in real-time
ASIO Direct Monitoring has not been enabled, and/or monitoring has been globally disabled.
The 8 ADAT channels do not appear at the output
The optical output has been switched to SPDIF. Nevertheless you can use the 8
corresponding playback tracks, by using TotalMix and mixing/routing them to other physical
outputs.
Playback works, but record doesn't:
Check that there is a valid signal at the input. If so, the current sample frequency is
displayed in the Settings dialog.
Check whether the Hammerfall DSP has been selected as recording device in the audio
application.
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 (see section 13.2 'Performance').
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).
User's Guide HDSP System Multiface © RME
33
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