[Bug 82471] Re: Add speaker configuration in Sound Properties

[Young-Ho Cha]

I have SBLive as audio device, and 4 channel speaker(output to Front
left, Front right, Rear left, Rear right).

In default configuration, just Front left, and Front right output is
working,

But after change output plugin pipeline to "alsasink device=surround40",
all speaker output is working.

See http://alsa.opensrc.org/SurroundSound FYI.

And if speaker type is digital (exactly, sound card is connected to
external digital amp with spdif), It need to resample audio sampling
rate. Most of digital output support 48000Hz only.

And it need to change output plugin pipeline to "alsasink device=spdif".

See http://alsa.opensrc.org/DigitalOut FYI.

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Add speaker configuration in Sound Properties
https://launchpad.net/bugs/82471