[gst-devel] Volume High/Low Pass Filters, AGC filter
wmiller at sdr.com
Fri Jan 7 21:09:52 CET 2011
I looked through the list returned by gst-inspect and in the list of all
plugins on the website and I don't see quite what I'm after.
First, Is there a stage to do volume pass filtering? Idea is to sniff audio
streams looking for low volume passages and replace them with silence or
whitenoise af a fixed volume.
Secondly, is there an audio AGC (automatic gain control) filter? Following
a 300 to 3000 Hz band pass filter and an element that can do the volume
pass operation, this element should clean audio (speech over noise mostly)
to control highly variable background noise and maximize the speech quality.
Think of a microphone in use in an outdoor industrial setting where machines
or heavy trucks start and stop continually. First select only the usual
voice band, flatten static, wind noise, motor/engine rumble, etc. then
modify the overall volume to a pleasant level.
Yes, of course this would make more sense as a hardware process, but I
though I might be able to use it to assist existing hardware or to augment a
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