Noise reduction plugin til Audacity

[claus erik]

på hjelpesidene til Audacity står det

 

http://audacityteam.org/wiki/index.pl?Reducing_Noise

Post-recording noise reduction. Noise can often be reduced during post-production, by use of various plugins. Typically, they are fed a sample of the noise alone and then subtract that noise from the rest of the recording. To facilitate this, be sure to record a second or two of "silence" before you start the actual performance. This gives you a clean sample of the noise. This works extremely well with low-level background sound like air conditioning.

 

Hvor kan man få tak i en slik plugin gratis/billig, og som funker på en treig PC?