> > record.adc-0:1_mute=off
> > record.adc-0:1=224,224
>
> that is amplifying the input to the ADC considerably. the 0..255 mixer
> values represet -16.5..+30dB *for this codec*. it would be nice if
> mixer values corresponded to decibles somehow, but that is not the case
> currently.
>
> > inputs.mic=85,85
>
> this is the mic pre-amp. *for this codec*, the values are 0, 10, 20, 30
> dB.
>
> you'll probably have better results using more mic preamp and not
> amplifying the ADC input signal.
>
> > outputs.mic_dir=input-vr100
>
> here you have the mic jack using 100% AVDD (5.0V). unlikely to change
> anything, but you might want to try input-vr50 and input-vr80.
The mixer settings above are a result of experiencing with
various combinations of more/less of preamp/mic-in/adc.
All the combinations I tried showed the DC offset,
but this one sounded "best": with more mic preamp
and less ADC input, or with less input-vr and more
ADC input, the amount of noise was untolerable.
I will play with them some more.
Thanks for the details!
(If mixer values corresponded to decibels,
that would be really good.)
Jan
