Operation And Usage; Playback; Dvd-Playback (Ac-3/Dts); Channel Count Under Wdm - RME Audio TotalMix Digiface AVB User Manual

Usb 3.0 digital i/o system, 128 channel avb interface, 24 bit / 192 khz analog stereo monitor, 128 x 128 matrix router

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8. Operation and Usage

In the audio application being used, Digiface AVB must be selected as output device. It can

often be found in the Options, Preferences or Settings menus, as Playback Device, Audio De-

vices, Audio etc.

Increasing the number and/or size of audio buffers may prevent the audio signal from breaking

up, but also increases latency i.e. output is delayed.

Note: This is a network audio interface. In a network, clock definition is of particular importance.

Therefore neither WDM nor ASIO are allowed to influence the sample rate. That setting is done

exclusively by the AVB Controller.

AC-3 / DTS

Popular DVD software players can send their audio data stream to any AC-3/DTS capable re-

ceiver via the Digiface AVB.

The sample rate must be set to 48 kHz in the Digiface AVB Controller, or the software will

only playback a stereo 2-channel downmix via SPDIF.

In some cases the Digiface AVB output device has to be selected in >Control Panel / Sound /

Playback< and be set as Default, or the software will not recognize it.

The DVD software's audio properties now show the options 'SPDIF Out' or similar. When select-

ing it, the software will transfer the non-decoded digital multi-channel data stream to a Digiface

AVB network channel.

Warning: This 'SPDIF' signal sounds like chopped noise at highest level.

Multichannel

PowerDVD and WinDVD can also operate as software decoder, sending a DVD's multichannel

data stream directly to the analog and digital outputs of the Digiface AVB. For this to work select

the WDM playback device 'Loudspeaker' of the Digiface AVB in >Control Panel/ Sound/ Play-

back < as 'Standard'. Additionally a Multi-channel WDM device is required, whose property of

7.1 Loudspeaker playback can be verified under >Configuration<.

PowerDVD's and WinDVD's audio properties now list several multichannel modes. If one of

these is selected, the software sends the decoded analog multichannel data to the Digiface

AVB. On some software it is not necessary to select the Loudspeaker in the Sound panel.

The Digiface AVB supports a maximum of 64 channels under WDM. These can be configured

and activated via the Settings dialog - WDM Devices, as Stereo or Multi-channel (8-channel)

devices.

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