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AU pitch shift woes

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Bret Williams
AU pitch shift woes
on Jul 8, 2013 at 2:43:25 am

So I used the au pitch filter to marry 2 pieces of music together. One was not in the right key. Worked great. Days later I'm trying to output the video, but I get all kinds of digital noise on that piece of music. Gotta output. Very lame. I thought we left little junk like this behind with QT?

Any ideas? I've tried exporting different codecs, adding other audio stuff to mix in, but nothing works.


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Jeremy Garchow
Re: AU pitch shift woes
on Jul 8, 2013 at 4:43:42 am

Trash render files and peaks data.


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Bret Williams
Re: AU pitch shift woes
on Jul 8, 2013 at 8:25:07 pm

Good ideas. But no luck. Renders fine in the app. But I assume it doesn't actually render, as there is no mixdown audio feature like in legacy. Only on export do I get the noise. It's like a digital buzzer. Just an error in the algorithm I suppose.

In soundtrack pro I applied the same filter and got the same result. Guess what worked best? I applied the same filter in FCP 7 and exported. Still got lots of cracks and pops but no buzzer. Took that result into soundtrack and cleaned up the pops. Works ok until I find a better solution.


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Kyle Bass
Re: AU pitch shift woes
on Jul 9, 2013 at 3:31:55 am

Did you try a different pitch shifting plugin? Maybe Pitch Shifter II?


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Bret Williams
Re: AU pitch shift woes
on Jul 9, 2013 at 2:13:31 pm

I tried that and compared to the AU pitch shift, it's a warbly murky mess. AU is so much better. Pitch shifter II was pretty unusable. At least in this case/song.


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Doug Metz
Re: AU pitch shift woes
on Jul 9, 2013 at 1:54:32 pm

Could be that your source audio files have different sample rates… I've noticed (for a long time, actually) that unless you bring in audio files with matching specs, you'll occasionally get junk like that on output.

Doug

Doug Metz

Anode


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Bret Williams
Re: AU pitch shift woes
on Jul 9, 2013 at 2:15:34 pm

That's a good point. But since I tried it directly in soundtrack, that shouldn't have been an issue I'd think. But I got the same result. The music WAS 44.1 though, from Killer Tracks. I'll give it a whirl in X after changing it to 48 first.


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Doug Metz
Re: AU pitch shift woes
on Jul 9, 2013 at 4:17:22 pm

As a side note, I've never been satisfied with Apple's pitch shifting - always sounds wobbly and makes me a little queasy.... I've been using Audacity for pitch / tempo shifting, which does a much nicer job of things.

Doug Metz

Anode


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Kyle Bass
Re: AU pitch shift woes
on Jul 10, 2013 at 4:34:39 am

The pitch shifter in iZotope RX is excellent, if you don't mind spending a little.


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Bret Williams
Re: AU pitch shift woes
on Jul 11, 2013 at 2:38:30 pm

What about Audition? I have it, but never used it.


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Bret Williams
Re: AU pitch shift woes
on Jul 11, 2013 at 2:49:13 pm

Just answered my own questions. Audition CC did a perfect job. No warbles, no pops. Bye bye soundtrack.


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