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level plugin by thomas <thomas@apestaart.org>
this plugin signals:
- channel
- RMS level
- peak level
- decaying peak level
over the given interval.
This is useful for a VU meter display and for plotting out the signal graph.
The VU meter can either display RMS, or display immediate peak level and
have the falloff decaying peak level displayed as a line.
The interval for signal emission, ttl of decay peak, and falloff of decay peak
can all be set.
The element only takes unsigned data in; it could be extended to signed as
well, if separate fast chain functions are made that displaces the incoming
data to its midpoint (ie, 0,65535 should be mapped to -32768, 32767)
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