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[PATCH] Audio: add configure of ALSA audio
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@BuddyZhang1
BuddyZhang1 committed Nov 21, 2016
1 parent c0ebb18 commit 494adcc
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@BuddyZhang1
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Usage:
This patch support record and play audio with ALSA.
On hardware, OP PC2 offer MIC and output sound. The ALSA lib has exist on original system,
we can use this patch to configure correct input/output channel.
On OP PC2, system has only one sound card for input:

root@Orangepi:~# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: audiocodec [audiocodec], device 0: SUNXI-CODEC sun50iw2codec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

  And system has two sound card for output:

root@Orangepi:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: audiocodec [audiocodec], device 0: SUNXI-CODEC sun50iw2codec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: sndhdmi [sndhdmi], device 0: SUNXI-HDMIAUDIO sndhdmi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

When you want to use [audiocodec] or [sndhdmi] as output sound, you should choice output sound
card first.

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