User's Guide Digiface AES
©
RME
21
8. Operation and Usage
8.1 Playback
In the audio application being used, Digiface AES must be selected as output device. This can
often be found in the
Options, Preferences
or
Settings
menus under
Playback Device, Audio De-
vices, Audio
etc.
WDM playback devices are not available if the number of WDM devices is set to 0 in the
Settings dialog.
We recommend switching all system sounds off (via >
Control Panel /Sounds
<). Although the
Digiface AES comes with extensive support for system audio, setting it to be the
Default Device
for playback could cause problems when working with ASIO.
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. For synchronized playback of audio and MIDI
(or similar), be sure to activate the checkbox ‘Get position from audio driver’.
Note: Since Windows Vista the audio application can no longer control the sample rate under
WDM. Therefore the driver of the Digiface AES includes a way to set the sample rate globally for
all WDM devices within the Settings dialog, see chapter 7.1.
8.2 DVD-Playback (AC-3/DTS)
Popular DVD software players can send their audio data stream to any AC-3/DTS capable re-
ceiver via the Digiface AES SPDIF output.
The sample rate must be set to 48 kHz in the Digiface AES Settings dialog, or the software
will only playback the down-mixed analog signal via SPDIF.
In some cases an Digiface AES output device has to be selected in >
Control Panel / Sound /
Playback<
and be set as
Default
for the software to recognize it.
The DVD software's audio properties now show the options 'SPDIF Out' or similar. When selecting
it, the software will transfer the non-decoded digital multichannel data stream to the Digiface.
Note: This 'SPDIF' signal sounds like chopped noise at highest level. Try to avoid mixing and
routing the signal to your loudspeakers, as they might get damaged.
Multichannel
DVD software player can also operate as software decoder, sending a DVD's multichannel data
stream directly to the analog outputs of the Digiface AES. For this to work select the WDM play-
back device ’Loudspeaker’ of the Digiface AES in >
Control Panel/ Sound/ Playback
< as
Default
.
The playback software’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 AES. TotalMix
can then be used to play back via any desired output channels.
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Содержание Digiface AES
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