[alsa-devel] SALSA library and recording

reetesh chandran reeteshchandran at yahoo.com
Wed Apr 15 20:40:51 CEST 2009

Hi Manisha,
Sorry this is not a response which will help you.
I am facing similar issue. I am using SALSA and I am trying to record from a USB headset. The USB headset does have a mixer elem "Mic". But when I use snd_mixer_selem_get_capture_dB_range() or snd_mixer_selem_get_capture_volume_range() I just get zeroes. 
I did not do any set() functions like snd_mixer_selem_set_capture_switch_all(). Do I need to do that ? What is your source of info about how to set up the mixer for capture ? 
Thanks in advance

--- On Wed, 4/15/09, Manisha Sankpal <manisha.sankpal at gmail.com> wrote:

From: Manisha Sankpal <manisha.sankpal at gmail.com>
Subject: [alsa-devel] SALSA library and recording
To: alsa-devel at alsa-project.org
Date: Wednesday, April 15, 2009, 9:32 AM

Hi All,
I am using salsa library to capture the data from the sound card.  The
requirement is that the recording should be done from line-in port of the
sound card. The selection of "Line-in" port should be done  programatically.

With ALSA library, I am able to select the line-in by calling
snd_mixer_selem_set_capture_switch_all()  function. However, this function
is returning an error when SALSA library is used.  Is there any other
function/way to select the line-in mixer element in the SALSA API?

The help would be appreciated.
Thanks & regards,
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