Time Warp function in GoldWave

[DRP]

For reasons that I won't bother going in to, I frequently need to convert 23.976fps videos to PAL for correct viewing. I am using GoldWave's Time Warp to do the audio portion of this conversion.

Up until now I've just been using the default RATE algorithm for the adjustment which affects the pitch of the sound. I've recently tried the other two algorithms, SIMILARITY & FFT, which claim to not affect the pitch of the sound.

Unfortunately, with these two methods the accuracy of the change doesn't appear to be very good. Specifying a required time length or % change results in the duration being being 10 & 20 seconds out from what it should be in a 100min long audio track.

Is this a known problem with these methods or am I doing something wrong? Only the RATE method produces an accurate time change as far as I can work out.

[FulciLives]

I don't know how true this is but I've heard that most PAL encoded video from 24fps film material has a pitch shift due to speeding the audio to match the 25fps of PAL

Apparently the problem is doing the speed up while adjusting pitch. From what I've heard there is no effective way to do this EVEN FOR A COMMERCIAL DVD release.

So if they don't bother or can't do it due to technical limitations you think a standard PC using a consumer/prosumer WAV editor will do better?

Makes sense assuming what I've read is true.

- John "FulciLives" Coleman