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[Help] Slow down or speed up Audio for projects
#1
Question 
I usually not keen in slowing down or speedin up audio, but sometimes you've to do it. So what are the best method to match the audio to a specific framerate?
Any suggestions for any of the following programs:

Adobe Audition
Audacity
Apple Logic Pro


I think you also need to take the change of sample rate into consideration. Anything I need to be aware of?

Thanks for the help Smile
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#2
Audacity - ‘change tempo’ was what I was told (by Jerry on here I think)
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#3
eac3to can slowdown PAL or film speed (24.000) to 23.976
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#4
(2021-08-23, 09:47 PM)zoidberg Wrote: eac3to can slowdown PAL or film speed (24.000) to 23.976

I tried eac3to. Result was bad. I used -slowdown and -23976 commands. Resulting output was longer then it should've been. Therefor unusable Sad
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#5
(2021-08-23, 09:47 PM)zoidberg Wrote: eac3to can slowdown PAL or film speed (24.000) to 23.976

This is what I use, though I'm mostly adjusting 23.976 and PAL to 24.000 fps.
Program material is recorded on the other side of this disc...
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#6
If it's PAL all you need is the -slowdown command. It looks like you gave eac3to a 23,976fps file and asked it to slow it by a factor of roughly 1000
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#7
In my case it was 24fps as source and result needed to be 23,976fps

But I asked here more in general Wink
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#8
Try
Code:
input output -24.000 -changeto23.976
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#9
(2021-08-24, 12:30 AM)zoidberg Wrote: Try
Code:
input output -24.000 -changeto23.976

Result is

Code:
WAV, 2.0 channels, 2:08:13, 16 bits, 1411kbps, 44.1kHz
Reading WAV...
Changing FPS from 24.000 to 23.976...
Reducing depth from 64 to 24 bits...
Writing WAV...
Creating file "\\Mac\Home\Desktop\test.wav"...
The original audio track has a constant bit depth of 16 bits.
The processed audio track has a constant bit depth of 24 bits.
eac3to processing took 3 minutes, 36 seconds.
Done.

Not happy with the change from 16bit to 24bit
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#10
If you want to keep the file 16bit use -down16 at the end of your command line
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