Making Sense of Sample Rate Conversion in Pro Tools 10, Part 2

Pro Tools 10 does a lot of the sample rate conversion for you behind the scenes. However, there are times when you'll need to be sample-rate savvy. Mike Watkinson demonstrates when and why in Part 2.  

In part 1 of this article we discussed the ability of Pro Tools 10 to play back audio files with differing sample rates in the same session, and the options offered by Pro Tools when importing audio to a session. In music-only situations (that is, not in post-production) the aim is to end up with all of the audio playing back at the same speed, the one at which it was recorded originally. In post production however, it is sometimes required to change the speed of audio to cope with the demands of changing moving image format, particularly when moving from film to video or vice versa.

Pull-ups and Pull-downs

In order to cope with the technical limitations of each format'"when moving image is transferred from film to video or video to film'"its speed has to be changed. This means that the audio needs to be sped up or slowed down to match. Pro Tools 10 offers the ability to '

Mike has been obsessed with music software since he first saw Fairlight's Page-R, and has tracked its development through his work as a performer, composer and producer. As a writer he has contributed articles to Sound On Sound since 1999, and currently writes their Apple Notes column. As well as being a certified Logic Pro and Pro Too... Read More


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