[pulseaudio-discuss] PA volume effects

[Daniel Mack]

On Mon, Apr 27, 2009 at 07:12:32PM +0200, Lennart Poettering wrote:
> > > Please try to reproduce this, then do "ls" in pacmd and paste it
> > > somehere. This should show if PA does digital amplification for any of
> > > the active streams.
> > 
> > It's always reproducable, here is the output:
> > 
> > 	http://caiaq.de/download/tmp/pacmd-distortion.txt
> > 
> > Let me know if I can provide more details.
> 
> Hmm, that output suggests everything is in order. Both the sink and
> the stream are fixed to 0dB so PA shouldn't touch the data at all,
> just pass it through to the device.
> 
> Hmm, what makes me wonder though is the 's24be' sample format. There
> might be something wrong with the conversion code for that. 

Yep, that was my first guess, too.

> s24be is 24 bit packed big endian. Is that really the native sampling
> format of the device?

Yes, it is. There is no sample modification done in the driver at all to
keep it as simple as possible. Hence I can exclude that as the culprit
:)

Daniel