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need to change the duration of a song and keep the song sounding good!

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Ben Barnes
need to change the duration of a song and keep the song sounding good!
on Sep 22, 2008 at 9:54:34 pm

I need some help. I have a song i need to sync to a music video. It's running a little slow. I need to change duration by 2% (shorter) and preserve the pitch. In Audacity, Peak, even Soundtrack Pro, changing the duration makes the song sound terrible, just warbly and awful.

Is there a program / technique where I can make an audio track (aif) 98% of its regular length, preserve pitch, and have the song sounding as good as the original?



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Ty Ford
Re: need to change the duration of a song and keep the song sounding good!
on Sep 22, 2008 at 10:36:48 pm

Hello Ben and welcome to the Cow Audio Forum,

I haven't tried the applications you mention, but ProTools LE might be able to do that well without changing the pitch.

From the Skin The Cat dept., can you just find an internal edit that makes the song 2% shorter?

Regards,

Ty Ford



Want better production audio?: Ty Ford's Audio Bootcamp Field Guide






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Ben Barnes
Re: need to change the duration of a song and keep the song sounding good!
on Sep 23, 2008 at 12:00:53 am

that's the problem. it's a one-take video. frown.






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Ty Ford
Re: need to change the duration of a song and keep the song sounding good!
on Sep 23, 2008 at 12:45:53 am

Why does it have to be shorter?


Regards,

Ty Ford

Want better production audio?: Ty Ford's Audio Bootcamp Field Guide






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Ben Barnes
Re: need to change the duration of a song and keep the song sounding good!
on Sep 23, 2008 at 12:54:53 am

We shot at 36fps on an HVX camera. We used playback with a speed adjust of 66.67, but either a decimal got rounded or some mental mistake happened, and we would up roughly 1.8 to 2% off, with the video being shorter than the audio.

efforts to extend the video with FCP and AE proved either clunky (FCP) or time consuming and glitchy (AE). i did a slight pitch adjust, but the label found the resultant audio to be noticeably worse than the original track.

if anyone's curious, here's the take with a 102% speed/pitch adjust:

http://www.benbarnes.net/why/shoeing_final.mov



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Ty Ford
Re: need to change the duration of a song and keep the song sounding good!
on Sep 23, 2008 at 1:42:39 am

Ben,

So you shot at 36 fps and want to post it at 30 fps.To slow the action down slightly? Just curious.

You shot audio and video into the same camera? You may not be hosed. There may be a way to do the conversion so that the audio works as well. I'm not the SMPTE expert, but you may find help in one of the Cow video forums.

The newsgroup rec.arts.movies.motion.picture.sound has some very knowledgeable folks who know a lot about these sorts of things.

Regards,

Ty

PS: nice looking video

Want better production audio?: Ty Ford's Audio Bootcamp Field Guide






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Ben Barnes
Re: need to change the duration of a song and keep the song sounding good!
on Sep 23, 2008 at 2:41:49 am

thanks. the conversion is not 36 to 30, but 36 to 24 (technically 23.976), so it's at a 2/3 rate.



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Ty Ford
Re: need to change the duration of a song and keep the song sounding good!
on Sep 23, 2008 at 3:03:46 am

Yeah, I figured that out once I saw the 23.98 on the quicktime (command-I) report.

So do ya think it's the difference between 23.976 vs. 23.98?

Since it's so short, can you do the math as exact as you can, give me that and put me up a stereo mixed track somewhere to see if I can crunch it in PTLE?

Regards,

Ty Ford



Want better production audio?: Ty Ford's Audio Bootcamp Field Guide






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Ben Barnes
Re: need to change the duration of a song and keep the song sounding good!
on Sep 23, 2008 at 8:12:55 pm

thanks, Ty. We're trying it in logic at the moment. If that's a bust, i'll be sure to send you the file and info. thank you for the offer.

ben



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