[agl-discussions] Recording audio on M3+KF on AGL 6.0

[Jason Reich]

Hi Thierry,

Thanks for suggesting the mute, that was the problem.


Now I can record some audio but the static and noise level are very high; I can hear my speaking, but faintly.   Are you of aware of anything about that?  I'm going to play more with the levels and see if I can figure out what's going on.


thanks for the assistance,

Jason.

________________________________
Date: Wed, 31 Oct 2018 16:58:21 +0100
From: Thierry Bultel <thierry.bultel at iot.bzh>
To: automotive-discussions at lists.linuxfoundation.org
Subject: Re: [agl-discussions] Recording audio on M3+KF on AGL 6.0
Message-ID: <0ca6ff27-7c02-3a6f-7d15-91736e43fc95 at iot.bzh>
Content-Type: text/plain; charset="windows-1252"; Format="flowed"

Hi Jason,

capturing with 4a is a work in progress.
If the hw:2 is actually the sound card you want to capture from,
the method you are using should work.

I suspect that your input PCM is in mute state, there is a known issue
about that
Could you check or set it like this:

m3ulcb:~# amixer -D hw:ak4613 cget iface=MIXER,name='DVC In Mute Switch'
numid=15,iface=MIXER,name='DVC In Mute Switch'
 ? ; type=BOOLEAN,access=rw------,values=2
 ? : values=*on,on*

You can change the state this way:

m3ulcb:~# amixer -D hw:ak4613 cset iface=MIXER,name='DVC In Mute Switch'
*off*
numid=15,iface=MIXER,name='DVC In Mute Switch'
 ? ; type=BOOLEAN,access=rw------,values=2
 ? : values=*off,off*

Regards,
Thierry

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