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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Add keyword to disable channels in profile mappings of multi-channel devices"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91470">91470</a>
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<th>Summary</th>
<td>Add keyword to disable channels in profile mappings of multi-channel devices
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<th>Product</th>
<td>PulseAudio
</td>
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>core
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<th>Assignee</th>
<td>pulseaudio-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>rene@bartschnet.de
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<th>QA Contact</th>
<td>pulseaudio-bugs@lists.freedesktop.org
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<th>CC</th>
<td>lennart@poettering.net
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<p>
<div>
<pre>Currently the only way to separate channels of multi-channel devices is
module-remap-{source|sink} which is complex to configure and tends to block the
operation of Pulseaudio when devices are missing/not connected. It's not
possible to publish device-specific profiles using module-remap-{source|sink}.
In profile-mappings it's possible to disable audio-routing by naming channels
of a channel-map "aux[0-15]". But the source/sink is still handled as
multi-channel device with e.g. 10 channels. Consider an audio-device with 10
output-channels and you want to use only 2 channels...
A channel-map would look like
channel-map = left, right, aux2, aux3, aux4, aux5, aux6, aux7, aux8, aux9
PAVUControl doesn't list 2 channels, but 10!
Please add a new keyword - like "none" - to disable a channel completely and to
decrease the channel count.
Example:
[Mapping Stereo1]
channel-map = left, right, none, none, none, none, none, none, none, none
[Mapping Stereo2]
channel-map = none, none, left, right, none, none, none, none, none, none
[Mapping Stereo3]
channel-map = none, none, none, none, left, right, none, none, none, none
[Mapping Stereo4]
channel-map = none, none, none, none, none, none, left, right, none, none
[Mapping Stereo5]
channel-map = none, none, none, none, none, none, none, none, left, right
would allow to use one multi-channel sink with 10 channels as 5 stereo sinks.</pre>
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