manpage: ao_alsa: link upmix wiki entry

Also clarify the statement about what we expect to happen by default.
It's well possible that distros at some point will fix their ALSA
configuration, and e.g. enable the upmix plugin by default.
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wm4 2014-12-16 05:11:14 +01:00
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@ -91,13 +91,17 @@ Available audio output drivers are:
provides no good way to play multichannel audio in a non-exclusive
way (without blocking other applications from using audio), the player
is restricted to the capabilities of the ``default`` device by default,
which means it supports only stereo and mono. But if a hardware device
is selected, then multichannel audio will typically work.
which means it supports only stereo and mono (at least with current
typical ALSA configurations). But if a hardware device is selected,
then multichannel audio will typically work.
The short story is: if you want multichannel audio with ALSA, use
``--audio-device`` to select the device (use ``--audio-device=help``
to get a list of all devices and their mpv name).
You can also try
`Using the upmix plugin <https://github.com/mpv-player/mpv/wiki/ALSA:-Surround-Sound-and-Upmixing>`_.
``oss``
OSS audio output driver