Audacity Forum

Here's a sample which ducs the music according to the zero crossing rate: zero-crossings.mp3 It is: original intro --> zero crossing rate (sine tone) --> original multiplied by inverse zcr. That's one of those features I've mentioned. One would naturally set a threshold for the zcr, e.g. all above 0...

I think that this could all be done in Nyquist. However, it is a rather ambitious project. There is almost everything involved that makes up modern DSP. You can hardly do anything if part of the song or the announcer is buried in the applause, unless you have a wide stereo image. You could as a firs...

Koz, do you mean my code-example?
It gives this:

kozikowski wrote:Partial Reversion?
Koz

Sorry, that's maybe a bad wording...
The sound is frame-wise reversed and re-mixed.
There are about 5 frames per second.

That's rather hard to do, at least if it should still sound like the original. Here's a simple example, based on partial reversion of the sound: scramble.mp3 The window size is 16784 samples with 50 % overlap. Here's the code: (defun cosine (freq) (abs-env (hzosc (snd-pwl 0 *sr* (list 0 freq (1- *fr...

Have you tried a highpass filter to remove unnatural DC-offset?
The cut point has to be very low (let's say 80 to 120 Hz).

I'm just talking about the "squiggly" noise which is left after the vocal remover effect is run over audio. Is there a way to hone in on these audio artifacts to remove them? Is there a free add on or development on a new free feature which can work to remove these artifacts? Artefacts ca...

You can use an external dither program to apply the dither only to the fade-out section.
Stay in 32 bit float, create the envelope, mix&Render to a new track, apply dithering (plug-in) and export this track.
The internal dithering has of course to be turned off.

Digital artefacts are frequently created through mp3 compression--it is not dither noise (I assume). They are the result of rounding errors and alike. They only stay for a short time which corresponds to the frame size and are isolated peaks in the spectrum. Just like short, unmodulated sine tones. ...

Yes, "Normalize" brings all tracks up to the same level. All previous instrument balance will be destroyed. The best solution is to use "Amplify" instead. Procedure with multiple tracks: Select all Mix and render to new track (Ctrl-Shift M) Select all Amplify (Click Ok or subtrac...