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level plugin by thomas <thomas@apestaart.org>
basic level indicator; prints out RMS values averaged over the buffer of
one iteration. Insert this into an audio/raw chain.
You can plot the level envelope of the track using gnuplot, example :
tools/gstreamer-launch disksrc location=foo.wav ! parsewav ! level ! \
fakesink silent=true > foo.level
graph -T gif foo.level > foo.gif
xview dark.gif
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