restoring old record tape record with dying batteries

D

deodorel

New member
Hello everyone!
I have an old record, recorded on a tape recorder. At a certain point, the batteries begun to die, so the record begins to have a higher and higher pitch. I tried fixing it with some some software a few years a go, but the problem is that the pitch changes, so i could not properly fix it for the whole bad area, and i put the project on hold at the time. However, the developer in me tells me that the pitch changes linearly so i should be able to fix the record if i had so programming language to work with. Do you know any software that would allow me to do this? Thanks!
 
If it's a straight forward linear change, I could do this for you.
I don't imagine it is, but I might be able to do something anyway.

Can you make the file available to me?
 
Yes i could, the thing is that, 10 years a go (yes i just looked at the timestamps) i separated the records in multiple files while trying to find sections with similar pitch. I will upload them somewhere, but i would really love to know how you did it, if you manage something :).
I allways hoped that something like avisynth exists for audio processing.
I'll be back with a PM with the files. Thanks!
 
I have a plugin right here which applies a gradual slow down or speed up to a waveform, but it doesn't seem to have any customisable parameters. It seems to be for dramatic effect rather than restoration.
Still, I might be able to work something with it.
I know I can slow down/speed up (+pitch) audio with PT elastic audio, but I'm not sure how you would do it gradually.
Still, I'd be interested to try.
 
Thanks for the tip, i will look at the demo version, but i don't think i'm willing to shell 3k for restoring some tapes from my youth :)
 
The current version of Audacity has a sliding time scale/pitch shift function, presumably for such an occasion. And it's free... :)

Since it's an audio editor, it's handy for these kinds of situations.

If you have a pal with resto skills (like Steenamaroo), then by all means let him have a go.
 
allegro1650 said:
The current version of Audacity has a sliding time scale/pitch shift function, presumably for such an occasion. And it's free... :)

Since it's an audio editor, it's handy for these kinds of situations.

If you have a pal with resto skills (like Steenamaroo), then by all means let him have a go.
Click to expand...

Edit.
I see the tool in audacity. That's similar to the one in PT. Start point speed + end point speed....linear transition applied.

I'll give it a blast but it aint easy with the foreign voice/language. :p
 
Reaper does this, too. Kinda right on the timeline.

Be aware that you will also be shifting the cutoff at the top end. This might not be a big deal if you're not going very far, but if you pitch it down an octave, you'll hear the difference.
 
ashcat_lt said:
Reaper does this, too. Kinda right on the timeline.
Click to expand...

That sounds like the ticket. I'm not having much success here at all. Anyone prepared to take a look in reaper.
OP, do you mind if I make the files publicly available, or would you do it? I won't without your consent.
 
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