Audacity Forum

I was rethinking and editing my last post, I think our messages crossed.

Would this change a frame to the array of squares, faster than loops written in lisp? It is less code to read. Yes that'll be pretty fast. A good way to get an idea of how quick or slow a function will be is to write a simple test case that can be run in the Nyquist Prompt effect, for example: (if ...

But I suppose I could use snd-from-array and snd-fetch-array to convert? Would this change a frame to the array of squares, faster than loops written in lisp? It is less code to read. (let* ((snd (snd-from-array 0.0 1.0 frame)) (sndsq (mult snd snd)) (len (length frame))) (snd-fetch-array sndsq len ...

... better than they were a few years ago, but it is still an incomplete and ongoing job bringing it all up to scratch. My comments are intended to help bring you up to speed on some of the less well documented issues.

It is probably easiest to search for the Zero crossing from a given time index via an ordinary Loop where the search in both directions is possible. However, a list is sometimes very useful and the above method can easily be adapted to search for pauses greater than an arbitrary length. Besides, Sre...

I just looked up the distinction between sref-inverse and snd-inverse. Might the use of snd-inverse be an improvement in time complexity here?

Sorry to bump up this thread, but I'm wondering if somebody can help me with identifying the values of GVerb for this? I seem to keep getting too much echo, I'm just wondering if somebody could open up their Audacity and see if they can get something sounding ...

Ah, so you mean sref-inverse could give the routine "quadratic" complexity as I said... but the linearity of the LISP solution would have such a big coefficient that it is still a loser. The LISP loops I have already written and used seem tolerably fast for the amounts of data I give it. N...

You could try using the Transcription Toolbar to play back track-1 faster - see: http://manual.audacityteam.org/o/man/transcription_toolbar.html The key thing about this is that it only temporarily affects playback and does not change the underlying recorded track(s) Also if you definitely know that...

How Long is the second track that should be found?