Audacity Forum

Trebor, are you also removing LP noise? Try increasing crossfade percentage to avoid artifacts. waxcylinder, maybe raising the floor of frequencies to check would reduce the time and make progress more meaningful. I don't pretend that this is a finished project. There will be more updates. FIxing LP...

Experiments with Click Removal at various levels of sensitivity suggest that it is not suited for my needs. I zoom in on places where the waveform changes, and in waveform (Not DB) view, it is evident that certain small peaks just get chopped off with a linear interpolation of samples. This is not f...

I see a couple downloads. Any comments? Another iteration is in the works.

Audacity's own Repair is a manual defect remover, which treats some of the things I want to remove, but it doesn't automate over minutes of sound.

How much of what I want to do might be done by Click Removal?

Here's an update. I reorganized things so that the progress indicator bar is more meaningful, and I fixed a bug in the cutoff for high-pass biquad filters. I think my next task will be to improve the precision of click boundaries. This tool has a "block size" parameter, which is supposed to be the m...

No, steve, I was not taking slope of s, but of a sound defined in Nyquist prompt with its starting time set to nonzero. Yet the result had 0 for its snd-t0. Even if the result of slope did start at the same time as the input, it still needs a shift-time by half a sample interval, so that slope sampl...

UPDATE 10/23: see my next post. A couple days' work at coding and debugging, and I have something that shows some promise already. I think this is good at detection, but variable at fixing the problems, sometimes very good, sometimes worsening the result with strange artifacts, but more often it is ...

Perhaps I am not looking at the most current documentation, but here: http://www.cs.cmu.edu/~rbd/doc/nyquist/part8.html I read: slope(signal) [SAL] (slope signal) [LISP] Computes the first derivative (slope) of signal. The start time, sample rate, etc. are taken from signal. But experiments suggests...

Not at all, waxy, I'm glad for the better understanding of noise removal.

Yes, phase problems. You did not answer the other implied question: what good would it be to do time smoothing, but not frequency smoothing? In other words, just lowpass at a constant frequency. How high to most people hear? I am not too concerned about what happens near the Nyquist frequency, becau...

I was being foolish, I overlooked the phase of 90 without which it didn't make sense. So steve is smoothing in time and frequency both. Do you think that will be much improved over either smoothing alone? How is the rolloff of lp compared with lowpass2, etc. ? I might attempt something more complica...