ReSampling - What rate?

[neilwilkes]

I have a client who has suppliedme with a set of Audio files from Video captures.
Here's the rub.
Originally these were at 25fps.
They recaptured at 24fps, and as a result the audio is the correct length compared to the video, but pitched down.
I really do not fancy repitching (artifacts) and would rather use an internal Sample Rate Conversion, so the converted files play out at the correct pitch on export.
Project details are 24fps, 48kHz.
It is only the supplied audio that is the trouble here.......what rate do I convert it to, so that playing it out in a 48k project gets me the correct pitch please?

Thanks Guys & Gals

[FullFrequency]

Well they went under a 4% slowdown, so i'm guessing a 4% pitch up which would be 46.08khz to get it to play faster in a 48khz session...... which makes little sense to me what so ever, only because i've never seen anyone do this before though..... can you even re-sample to any sample rate?... why not just pitch it up using a high quality processor like pitchntime?

[neilwilkes]

Originally Posted by FullFrequency

Well they went under a 4% slowdown, so i'm guessing a 4% pitch up which would be 46.08khz to get it to play faster in a 48khz session...... which makes little sense to me what so ever, only because i've never seen anyone do this before though..... can you even re-sample to any sample rate?... why not just pitch it up using a high quality processor like pitchntime?

Well, the problem with that is
A - don't have Pitch n Time or ProTools. No intentions of buying ProTools either.
B - pitch shifting will usually cause artifacts.
The running time is correct but the pitch is off by (I think) a semitone or so.
I will try resampling the file to 46.08kHz internally & see what happens, as this is the better way to go,.

Resampling is simple enough - I have often read of this being done.
PT can do it (not sure about the LE version) and Nuendo certainly can.
I don't need the file to run longer, or necessarily faster - just at a higher pitch and resampling should do this.

Thanks for the info!

[FullFrequency]

Ah ok.... i think though that by doing it that way you'll be changing the speed of the file, and not just the pitch, as the faster "clock speed" that the session's set to will just read the file faster due to it reading 48000 samples/second and you giving it a file that is 46080 samples.....

That's why recordings made at 192khz are amazing to pull into a session that's running at 48k without converting for sound design purposes.

FF