ALSA allows you to use LADSPA plugins in a software plug layer.<br><br>check out <br><br><a href="http://alsa.opensrc.org/index.php/Ladspa_(plugin)">http://alsa.opensrc.org/index.php/Ladspa_(plugin)</a><br><br>it has an example very close to your needs.
<br><br>best<br>brad<br><br><br><br><div class="gmail_quote">On Dec 3, 2007 12:52 PM, Nathan Curry &lt;<a href="mailto:thegnu@gmail.com">thegnu@gmail.com</a>&gt; wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I&#39;ve got a system I&#39;m doing tech support on, and I&#39;m trying to get all<br>audio streams normalized/compressed before the audio is spit out the<br>speakers.<br><br>Basically, we&#39;ve got several buttons that play an audio stream through
<br>mpg123. &nbsp;The streams are different volumes and that understandably<br>upsets the customers when they change audio streams and it&#39;s suddenly<br>blaring christian contemporary music at their patrons.<br><br>Does anyone know of any way to do this, or at least any little
<br>compression/normalization apps I might be able to pipe the data<br>through? I would prefer to avoid JACK, but that&#39;s only because I don&#39;t<br>want to have to do more work than necessary, and this isn&#39;t (rather,
<br>shouldn&#39;t be) a very complex system.<br><br>Any input would be appreciated. &nbsp;Thanks.<br>-Nathan<br>PS: This godawful thing is running on FC4 (vanilla, for all intents<br>and purposes), btw.<br>_______________________________________________
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http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user</a><br></blockquote></div><br>