User Manual

User's Guide Digiface AVB © 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 be avoided by using a higher

buffer setting/latency in the Settings dialog of the Digiface AVB. Furthermore PlugIns should be

deactivated temporarily to make sure they do not cause these problems. More information can

be found in chapter 20.1.

Another common source of trouble is incorrect synchronization. ASIO does not support asyn-

chronous 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 AVB

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 multiple devices of the MADIface series - they all have to be in

sync. Else a periodically repeated noise will be heard.

The Digiface AVB supports ASIO Direct Monitoring (ADM). Please note that not all programs

support 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.

x If the Digiface AVB is in clock mode Internal (= Master) all others have to be set to clock

mode Slave, and have to be synced from the Digiface AVB via word clock. The clock

modes of all units have to be set up correctly in their Settings dialog.

x If all units are fed with a synchronous clock, i.e. all units show Sync in their Settings dialog,

all channels can be used at once. This is especially easy to use 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

possible.

Using more than one Digiface AVB is currently not supported.