Audacity Forum

I have read compress.lsp and I think compress-map may be a useful piece of a compressor-expander, but I think there are some confusions in compress and agc. It looks like they introduce undocumented delays in the signal. And in compress, the conversion of gain from dB back to linear omits a factor ...

I am tardy in updating my Audacity. I have a function called compress defined in follow.lsp which doesn't look quite like this one. I wonder whether complicated following as in Chris's combined with a more complicated gain function is worth trying. No compress function is mentioned in http://www.cs...

I found it in Nyquist 3.08 source. So nobody adapted it into a .ny for Audacity? But that should be easy enough for me to try. The basic compression (compress...) is already implemented in Nyquist for Audacity. However, the art is to make the proper transfer function. I've tried a totally different...

Paul L wrote:Can you give me a more exact pointer? Is it undocumented? Is it in C Or Lisp?

If I remember correctly, the effect is a fancy and complicated way to do some wave shaping. It is nearer to a guitar distortion/compression effect than a multi-tool compressor. By the way, have you looked at RBD's compressor? The calculation of the non-linear 2-fold compression/expansion curve is qu...

Sounds to me strongly like a comb effect.
Try this in the Nyquist Prompt:

Here's a snippet for the Nyquist prompt that you can try (psetq center 4000; Hz width 200; Hz gain -12); dB, volume of the noise (here, 0.25 linearly) (sim (areson s center width 1); original without center (scale-db gain (reson (noise) center width 1))) The audio at the frequency center is replaced...

I found out: The transcription pauses plugin may actually be able to deal with large files too, the problem however is: It shows time passed and remaining time to work on the file, but even when remainin time shows 00:00 for ages already, the plugin is still processing. I noticed, because this happ...

Here's one. There's a lot of overlap, especially when you include harmonics & overtones. One common trick the pros use is to set-up a parametric equalizer with a notch (a deep cut over a fairly narrow frequency band) and then "sweep" across the frequency range to find "problem ar...

Thanks Roberts! So you make a real full length RMS then? as in here: http://upload.wikimedia.org/math/0/1/4/014a453df92ed77eca97b228f0624d9f.png Pretty cool then. Note time windowing for RMS has other use than real time display, it can provide interesting stas on a signal, such as min RMS, max, ave...