Sonifex avn PC-AD2, Handbook

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7
PC-AD2 - GPIO 4
7
PC-AD2 - Windows Audio Operation 3
Fig 3-1: PC-AD2 Line Output 1 Properties/Advanced Screen
Windows Mono Recording Bug
Windows currently has a bug which causes mono recording streams to
capture only the left channel of the source, rather than mixing the left and
right as earlier versions did. As a workaround until this is fixed, the driver
provides a
Mono Mix recording endpoint for each of the card’s inputs. By
default these are disabled, but can be individually enabled as follows.
Right-click on the loudspeaker symbol in the bottom right hand corner of
the screen and select Recording Devices. Right-click on any of the sources
and check Show Disabled Devices, which should then reveal two additional
sources called Input 1 Mono Mix and Input 2 Mono Mix. To enable these,
right-click on them and select Enable. Note that, after enabling, it will still
show as currently unavailable as these endpoints are multiplexed with the
normal stereo inputs and are only activated when opened by a recording
application. Also be aware that, for the same reason, the stereo and mono
mix endpoints for the same source can’t be used simultaneously.
The Mono Mix endpoints should be used for communications applications
such as Skype which open a mono capture stream.
Note that there are no Mono Mix endpoints associated with the mono
microphone inputs when that mode is selected as these are inherently
mono.
Playback Endpoints
Each of the analogue and AES-3 playback endpoints has a set of control
faders which are accessed by right-clicking on the endpoint, selecting
Properties and clicking on the Levels tab.
At the top is the master fader which sets the overall output level. Below this
are individual faders for each of the playback mixer sources.
The Wave source is the output from any playback software running on the
PC. By default it is set to 100%. If multiple applications are producing audio,
Windows automatically mixes their output, with sampling rate and bit
depth conversion applied when necessary, before applying the end result to
the card.
Below this are faders corresponding to the card’s inputs. Each input can be
passed directly to the output by opening the corresponding fader.