[linux-audio-dev] Silence Detection

[Steve Harris]

On Fri, Oct 18, 2002 at 12:52:45 +1000, Conrad Parker wrote:
> > > I work with a small community radio station, and since we're continually
> > > strapped for cash we implement our studio-transmitter link by streaming
> > > audio over a network. We use a variety of players and formats (mainly xmms
> > > and realplayer), but all of them share a common problem. Despite our
> > > process monitoring software, the stream occasionally goes silent. We would
> > > like to find a way to detect when the output of the playback computer's
> > > soundcard is silent- or at least quiet enough to count as such.

Sorry, I missed the beginning of this thread. If you have someone who can
do a little hacking, it should be easy to take an evelope follower plugin
(there is one in the CMT LADSPA plugins) and just compare it's output
against a signal level (eg. 0.01f).

You could do all this in the universal panacea (pd ;), it could also
produce an alert noise or something.

- Steve