asterisk users - May 2007 - ices low volume

(this was also posted to the asterisk forum, but received no replies...
Maybe someone here can help)

I'm using the ices command to stream a conference to an icecast server.
This is working nicely, for the most part, but the volume is very low.
The streamed ogg vorbis audio is much quieter than what I hear in a SIP
client, for example (on the same machine with the same audio hardware,
of course).

I'm using the debian package of asterisk, version 1.2.13~dfsg-2

Any idea what could be happening here? My one guess, which is probably
far off the mark, would be that asterisk is outputting the mu-law audio,
and ices is expecting plain 16bit pcm. If I'm following the conversion
process properly, that could result in the volume reduction I'm seeing,
but I'm not sure. 'show channel ___' shows the NativeFormat,
ReadFormat
and WriteFormat all as 64 for the ices channel though (and all the other
channels...), which I gather is supposed to be linear PCM, so maybe I'm
completely wrong.

As a workaround, is there any way that I could boost the volume just for
the audio going to ices? I don't want to raise the volume for the
conference as a whole if possible, since that's sounding just fine for
those talking.

Thanks!
-- 
Jon-o Addleman - http://www.redowl.ca

Jon-o Addleman wrote:
> I'm using the ices command to stream a conference to an icecast server.
> This is working nicely, for the most part, but the volume is very low.
> The streamed ogg vorbis audio is much quieter than what I hear in a
    SIP
> client, for example (on the same machine with the same audio hardware,
> of course).

Replying to my own question:

It appears that's it's not a problem with the ices application. I dumped
the audio using a simple EAGI bash script (cat /dev/fd/3 > output.raw)
and found the same low volume level.

I must be misunderstanding something here. Why would the volume be so
different through a voip client compared to the audio data dumped from
the channel?

-- 
Jon-o Addleman - http://www.redowl.ca