Experience with Capstan - audio wobble removal?

[Paulie]

http://www.celemony.com/en/capstan

I've got some old recordings that I want to save before the tapes disintegrate. This is pretty expensive software, a five day rental costs $199. Would like to know if anyone has used it and if it delivers what it promises.

Thanks!

Paulie

[Len911]

Paulie, I don't know.

https://en.wikipedia.org/wiki/Wow_%28recording%29
" The software Capstan by Celemony analyzes the already digitalized musical material and uses varispeed playback to eliminate wow and flutter.

Why couldn't you just scrub the audio, place markers, and pitch shift in cents until you arrive at the best up, down pitch shift in cents? I would think it might be very much a pattern, like every 1 sec for 1 sec duration, pitch up 1 cent.

If you could see where the change started and ended on a spectrogram, you could just place markers at those points. It's possible the daw has a varispeed function, and you could just automate it to the markers??

Probably sounds simpler than it is, but I would think the first step should be recording the tapes to digital.

[mojobone]

I haven't checked out Capstan, but there's a process whereby a tape's bias is 'decoded' and used to create a sort of tempo map on a microscopic scale, and it does eliminate wow and flutter very effectively indeed. It's expensive, it's accurate, but I'm not sure if it's digital or partially electro-mechanical. Ah, Plangent process it's called; here's a link: http://tapeop.com/interviews/btg/94/jamie-howarth/

Yeah, this Capstan thing sounds different. They say it can restore warped vinyl, as well.

http://www.soundonsound.com/reviews/celemony-capstan

I theenk I recall some early attempts at this sort of thing that were based on 60-cycle hum.