[LAU] audio compression of all alsa output?

bradley newton haug bradleyhaug at gmail.com
Mon Dec 3 16:50:36 EST 2007

ALSA allows you to use LADSPA plugins in a software plug layer.

check out


it has an example very close to your needs.


On Dec 3, 2007 12:52 PM, Nathan Curry <thegnu at gmail.com> wrote:

> I've got a system I'm doing tech support on, and I'm trying to get all
> audio streams normalized/compressed before the audio is spit out the
> speakers.
> Basically, we've got several buttons that play an audio stream through
> mpg123.  The streams are different volumes and that understandably
> upsets the customers when they change audio streams and it's suddenly
> blaring christian contemporary music at their patrons.
> Does anyone know of any way to do this, or at least any little
> compression/normalization apps I might be able to pipe the data
> through? I would prefer to avoid JACK, but that's only because I don't
> want to have to do more work than necessary, and this isn't (rather,
> shouldn't be) a very complex system.
> Any input would be appreciated.  Thanks.
> -Nathan
> PS: This godawful thing is running on FC4 (vanilla, for all intents
> and purposes), btw.
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user at lists.linuxaudio.org
> http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
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