ACB reader, Matt, suggested I try the time correction technique in the last post in a different order. Previously I had dropped the pitch two octaves and then brought it back up two with the time correction enabled. This time I did the opposite, starting by increasing the pitch then lowering it to its original position. It definitely has a different sound. I think it’s much closer to the original than the previous example, but still an interesting way to manipulate the clip.

Time Correction Overload 2

Today during my audio production class I was demonstrating to my students how time correction impacts digital audio when pitch shifting more than a few semitones. To illustrate this I pitched down a chunk of music an octave with the time correction on in Pro Tools. The degradation was clear, but it occurred to me that it would be even more obvious if I shifted it back up to the original pitch with time correction enabled again.

This created an interesting way to effectively down-sample the audio. Intrigued, I applied the same technique over several times to hear what would happen on multiple passes. This is something I’m likely to explore more, but I tried it again on the snippet of music from Unprocessed Rhodes Pedal Noise going down two octaves and back up again. It sounds like the audio has been boiled in a pot of bathroom chemicals. Delicious!

Time Correction Overload