RME Audio Digiface Ravenna, Руководство пользователя

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20 User's Guide Digiface Ravenna
© RME
9.3 Known Problems
If a computer does not provide sufficient CPU-power and/or sufficient USB-bus transfer rates,
then drop outs, crackling and noise will appear. Such effects can often be avoided by using a
higher buffer setting/latency in the Settings dialog of the Digiface Ravenna. Furthermore PlugIns
should be deactivated temporarily to make sure they do not cause these problems. More infor-
mation can be found in chapter 25.1.
Another common source of trouble is incorrect synchronization. ASIO does not support asynchro-
nous operation, which means that the input and output signals not only have to use the same
sample frequency, but also have to be in sync. All devices connected to the Digiface Ravenna
must be properly configured for Full Duplex operation. As long as SyncCheck (in the Settings
dialog) only displays
Lock instead of Sync , the devices have not been set up properly!
The same applies when using more than one Digiface Ravenna. They all have to be in sync. Else
a periodically repeated noise will be heard.
Digiface Ravenna supports
ASIO Direct Monitoring (ADM). Please note that not every program
supports ADM completely or error-free. The most often reported problem is the wrong behaviour
of panorama in a stereo channel. Also try to avoid setting the TotalMix FX hardware outputs (third
row) to mono mode. This will most likely break ADM compatibility.
10. Using more than one Interface
The current driver supports up to three RME USB devices of the MADIface series. All units have
to be in sync, i.e. have to receive valid digital sync information.

If the Digiface Ravenna is set to clock mode internal, all others have to be set to clock mode
slave, and have to be synced from the master. The clock modes of all units have to be set up
correctly in the MADIface Settings dialog.

If all units are fed with synchronous signals, i.e. all units show Sync in their Settings dialog,
all channels can be used at once. This is especially easy to handle under ASIO, as the ASIO
driver presents all units as one.
Note: TotalMix is part of the hardware of each RME unit. Up to three mixers are available, but
these are separated and can't interchange data. Therefore a global mixer for all units is not possi-
ble.