Conforming from 25 to 24 with Cinema Tools – How to fix audio pitch

[Peter Brewer]

You could try using the audio stretch tool in soundtrack pro. That changes the length of the audio track but retains the original pitch.

Peter Brewer
http://www.peterbrewer.net

[Max Huggett]

Would that be a quick process of just bringing the audio off the QT, or would it bring in the video aswell?

I quickly tried changing the pitch in Soundbooth yesterday, and it natural pitch, it was going to take over 8 hours to render 1 hour of footage on a 8 core machine

Cheers
m

[Rafael Amador]

[Peter Brewer] “You could try using the audio stretch tool in soundtrack pro. That changes the length of the audio track but retains the original pitch. “
This would let all the audio out of sync.
Max, audio is not my strong at all (I wonder which is my strong if I have any) but sure somebody will chime in with the answer.
rafael

http://www.nagavideo.com

[Max Huggett]

Cheers Rafael

I have just opened my video in Sountrack Pro and played with the pitch settings. It was probably something that i was doing but it sounded like there where 2 voices, rather than 1. Not what i was after at all.

In the project window, i selected the pullup feature and it brought it back to its original sound, but i don’t know if that is just a display setting only and not able to be rendered out.

Any audio pros care to advise how i would render out my audio and would compressor be able to take 2 individual files and join them into 1.

Thanks alot

[Jeremy Garchow]

This is why I use Compressor to do my conforms.

BUT, that’s not to say I haven’t used Cinema Tools and let the pitch ride. No one will know except you and a few others.

Jeremy

[Michael Gissing]

[Jeremy Garchow] “No one will know except you and a few others.”

I hope that’s TIC Jeremy. Although few people regard audio as important, it is actually more important and vastly cheaper to perfect than pictures. A lack of regard shows ignorance, something I wouldn’t expect from experienced advisors on a public forum.

Please search this forum as I have answered this question so many times.

[Jeremy Garchow]

Yeah, every dog has his day, and today must be mine. Someone else accused me of not being a professional today. I guess it’s the way it is. But let me ask you this? Why is it that process is exactly how many many film to PAL conversions are made? Simply slow down the footage 1 frame per second and let the pitch go with it? I was just watching the special features on a movie from the US on a bluray the other day and one of those special features was a UK based tv show that was interviewing the director at a screening. The voice of the main character is highly recognizable, but guess what? It was obvious they were playing back 24 @ 25 and accepted the pitch down because that main characters voice was noticeably lower to me. Do you think anyone in that theater noticed? Maybe you would have, maybe someone from the US might have, but I can pretty much gaurantee that most of the people that walked out if that screening didn’t say, man that audio wad pitched down .4%. I am sorry you took offense, but I stand by my work. I have done many 24 @ 25 conversions, and never once had a complaint. Recently, I have started to use Compressor to conform as the pitch stays the same for producers that watch both versions on their computers.

Jeremy

[Rafael Amador]

As cameraman and video-editor, I would go to the “conform” (let the pitch correction for the audio guy) instead than to the “Standard Conversion” (Compressor).
With the Conform you end up with the same picture you started, pixel by pixel.
With the Standard Conversion you end up with nothing of the original film. Risky when working with compressed material.
Cheers,
rafael

http://www.nagavideo.com

[Michael Gissing]

Pitch correction should be applied but externally using proper software. I have a slight gripe with the slow down or speed up that is being commonly used to go from 25 to 24 or 23.976 to 25. I sat through a restripe of a doco recently with the director, having sped up the final mix 4.1% to match the 23.976 to 25 speed up for the BBC version.

The director was horrified at what a mere 4% did to the pace of his edit in spite of the fact that the pitch was corrected. It changed the feel of the show and we were both amazed at how subtle timings of pauses after important dialog became shortened by the speed up. Perhaps we were the only ones to really notice the difference, but if that had been combined with all the music being 3/4 of a semi tone sharp and the female narrators voice becoming higher pitched, I think the audience would have found the program uncomfortable.

I know it is a typical thing that what looks best wins over sound, but I do not like this approach to standards conversion, even though I have MPEX3 software which does an amazing job of speed change with correct pitch.

[Jeremy Garchow]

[Rafael Amador] “With the Standard Conversion you end up with nothing of the original film. Risky when working with compressed material. “

Hi Raf. There’s a conform function in Compressor. It’s not the same as Cinema Tools, but it’s there. No frame blending, no frame interpolation, what goes in is what comes out, just 1 frame per second slower.

Jeremy