[Audacity-nyquist] New plugin: Dynamic Lowpass (beta)

[Kurt Z. <kur...@t-...>]

Hi,

I'd like to introduce a plugin I'm working on. It is yet another attempt 
on broadband noise reduction.

The frequency of a lowpass is controlled by the amplitude of the signal. 
The lower the volume the lower the frequency of the lowpass. This gives 
(at least to my ears) a very smooth but reasonably effective noise 
reduction.

Though I developed the idea by myself, I found out that Philips invented 
a similar (unpatended) noise reduction system in the 70s for tape decks.

http://en.wikipedia.org/wiki/Dynamic_Noise_Reduction

http://de.wikipedia.org/wiki/Dynamic_Noise_Limiter

Please let me know of all suggestions or code improvements.

Best regards,

Kurt