#626: Some nvidia hdmis now supports more than 2 channels
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Reporter: howl | Owner: lennart
Type: defect | Status: new
Milestone: | Component: module-alsa-*
Resolution: | Keywords:
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Comment(by lennart):
For analog, ALSA provides device strings like "surround51:xx" which can be
used to imply a very specific channel order. However, there is only one
"hdmi:xxxx" device string which does not imply any channel order. HDMI on
the hw level is very flexible in the selection of channel maps. For every
number of channels it supports a number of different number of maps --
which is negotiated between the PC and the hdmi receiver.
If we'd add a 'default' mapping for multichannel here then this might work
for you, but won't work people with dfferent hardware.
To support this properly we need to wait until ALSA introduces a proper
channel map negotiation API, or at least hdmi device strings that imply a
channel order (i.e. 'hdmi-surround51:xxxx' or something like that. But it
doesn't do that right now.
--
Ticket URL: <http://pulseaudio.org/ticket/626#comment:7>
PulseAudio <http://pulseaudio.org/>
The PulseAudio Sound Server
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