Hi Steve,

Can OSS not mix the Mic and LineIn? Is there a problem?

Thanks,
Gopal Sukumar.

Steve Chen wrote:

On Mon, 2009-07-27 at 16:12 +0530, Prabhu Kalyan Rout wrote:


Hi Steve,
Thanks for the reply. Can you give me some pointers to example for
mixing the signals.




The man pages will give you the best information.  You can also see the
list of options by

# amixer --help

I attached a few quick examples for your reference.  amixer,without any
parameters, gives you the full list of controls.  On my dm355 board, I
have the following output.

# amixer
Simple mixer control 'PCM',0
 Capabilities: pvolume
 Playback channels: Front Left - Front Right
 Limits: Playback 0 - 127
 Mono:
 Front Left: Playback 112 [88%]
 Front Right: Playback 112 [88%]
Simple mixer control 'Line',0
 Capabilities: volume
 Playback channels: Front Left - Front Right
 Capture channels: Front Left - Front Right
 Limits: 0 - 9
 Front Left: 1 [11%]
 Front Right: 1 [11%]
...


If you want to look at specific control do (I use "Mic" as an example)

# amixer sget "Mic"
Simple mixer control 'Mic',0
 Capabilities: volume
 Playback channels: Front Left - Front Right
 Capture channels: Front Left - Front Right
 Limits: 0 - 9
 Front Left: 9 [100%]
 Front Right: 9 [100%]

To change the value do (again using "Mic" as an example)

# amixer sset "Mic" 5
Simple mixer control 'Mic',0
 Capabilities: volume
 Playback channels: Front Left - Front Right
 Capture channels: Front Left - Front Right
 Limits: 0 - 9
 Front Left: 5 [56%]
 Front Right: 5 [56%]


Regards,

Steve


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