Hi Liam,
Thanks for the quick response.
I've checked that audio path and there are no programmable amps. The audio chip has only one set of register bits for gain control and I've kept it at a minimum. (Also the gain knob in the Mic at a minimum)
But still the problems exist
(For the same config and same hardware OSS produces very feeble sound)
Is there any configuration that I need to edit in asla.conf or asoundrc
Is there any place in software where the recorded stream could be getting boosted or mixed??
Regards
Vishwas
On 9/15/06, Liam Girdwood <liam.girdwood@xxxxxxxxxxxxxxxx> wrote:
On Fri, 2006-09-15 at 15:50 +0530, Vishwas P S wrote:
> Hi group,
>
> I have a noise problem whenever I record sound with arecord.
> The sound seems to be very loud and it often gets clipped .. looks
> like the signal gets overloaded and gets clipped often.\
> I've ensured that the Mic gain is kept at a minimum and still it
> happens.
> (For the same config OSS gives a very low volume)
>
> What could be the problem. Pl help out
Your correct in that your input signal is being clipped because the gain
is too high.
It's worth checking the audio path between your mic and ADC to make sure
that there an no other amplifiers increasing the input gain. Please note
that some ADC's can also increase gain.
It's also possible that your hardware has ALC/AGC (Automatic Level|Gain
control). This automatically changes the gain depending on the volume of
the input signal so that the volume captured is constant. This will also
cause clipping if the settings are too high.
Liam
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