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Frames per second

Submitted by ussmc on
Forum

Hello all,
Can anyone recommend an Audio program that allows you to change the frame rate of a sound file (wav) from 30 to 24 frames per second without ruining the sounds?
And how to do it?

Submitted by Mick1460 on Sat, 01/07/06 - 2:38 AM Permalink

Huh?

Audio is sample and time based - You will need to work out what the time difference is between 30 and 24 frames with how long the file is. Then, all you need to do is stretch it (any basic audio application should do it).

Submitted by ussmc on Sun, 02/07/06 - 2:23 AM Permalink

Thanks for replying.

I used After Effects to set (stretch) the frame rate to 24 frames per seconds. But it played faster.
I need to adjust the playback speed without shifting and bending the pitch.
Can anyone name any proper audio editing tool that can achieve this?

Submitted by lorien on Sun, 02/07/06 - 7:17 AM Permalink

audacity.sourceforge.net is a (seemingly) simple free audio editor that can change length without changing pitch. It uses the fast fourier transform to do it's magic afaik, so you may find some "spectral smearing".

In Audacity 1.3 it is "change tempo" in the effects menu.

Submitted by ussmc on Wed, 05/07/06 - 1:41 AM Permalink

Thank you for replying.
According to Audacity's website version 1.3 is unstable. I tried it anyway and it gave me shocking result.
Version 1.2.4 gave me a better result, but still not accurate.
Do you (anyone) know any other audio editing tool that can achieve this?

Forgive my crap question, I'm not an audio guy.

Submitted by lorien on Wed, 05/07/06 - 3:35 AM Permalink

quote:Originally posted by ussmc

Thank you for replying.
According to Audacity's website version 1.3 is unstable. I tried it anyway and it gave me shocking result.

Odd, I tried it before suggesting it and it worked fine for me- I time compressed "A Love Supreme" (John Coltrane) and it sounded fine. I'm using Linux though of course.

Adobe Audition can do it, as can all the versions of CoolEdit- CoolEditPro evolved into Audition. Logic and Cubase and most of the audio packages should be able to- it's a pretty common requirement these days.

Submitted by ussmc on Thu, 06/07/06 - 12:55 AM Permalink

Just to make sure.
Did you use the "change tempo" in the effects menu?
Nothing else?

Thanks in advance.

Posted by ussmc on
Forum

Hello all,
Can anyone recommend an Audio program that allows you to change the frame rate of a sound file (wav) from 30 to 24 frames per second without ruining the sounds?
And how to do it?


Submitted by Mick1460 on Sat, 01/07/06 - 2:38 AM Permalink

Huh?

Audio is sample and time based - You will need to work out what the time difference is between 30 and 24 frames with how long the file is. Then, all you need to do is stretch it (any basic audio application should do it).

Submitted by ussmc on Sun, 02/07/06 - 2:23 AM Permalink

Thanks for replying.

I used After Effects to set (stretch) the frame rate to 24 frames per seconds. But it played faster.
I need to adjust the playback speed without shifting and bending the pitch.
Can anyone name any proper audio editing tool that can achieve this?

Submitted by lorien on Sun, 02/07/06 - 7:17 AM Permalink

audacity.sourceforge.net is a (seemingly) simple free audio editor that can change length without changing pitch. It uses the fast fourier transform to do it's magic afaik, so you may find some "spectral smearing".

In Audacity 1.3 it is "change tempo" in the effects menu.

Submitted by ussmc on Wed, 05/07/06 - 1:41 AM Permalink

Thank you for replying.
According to Audacity's website version 1.3 is unstable. I tried it anyway and it gave me shocking result.
Version 1.2.4 gave me a better result, but still not accurate.
Do you (anyone) know any other audio editing tool that can achieve this?

Forgive my crap question, I'm not an audio guy.

Submitted by lorien on Wed, 05/07/06 - 3:35 AM Permalink

quote:Originally posted by ussmc

Thank you for replying.
According to Audacity's website version 1.3 is unstable. I tried it anyway and it gave me shocking result.

Odd, I tried it before suggesting it and it worked fine for me- I time compressed "A Love Supreme" (John Coltrane) and it sounded fine. I'm using Linux though of course.

Adobe Audition can do it, as can all the versions of CoolEdit- CoolEditPro evolved into Audition. Logic and Cubase and most of the audio packages should be able to- it's a pretty common requirement these days.

Submitted by ussmc on Thu, 06/07/06 - 12:55 AM Permalink

Just to make sure.
Did you use the "change tempo" in the effects menu?
Nothing else?

Thanks in advance.