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Old 11-07-2016, 09:29 PM
drad dog drad dog is offline
Join Date: May 2015
Posts: 5,031
Originally Posted by Musicat View Post
Although you often read that the tape was slowed down by half or sped up by twice, in a professional studio there is no need to limit yourself to such fixed ratios. All professional recorders I've seen have a speed control, VSO (Variable Speed Oscillator) that can raise or lower the speed/pitch by any amount.

I once used this function on a 16 track machine, recording a standard B flat trumpet one step low. When played at normal speed with the other tracks, it sounded like a D trumpet -- higher and a little thinner in timbre, the sound I was going for.
By slowing or speeding to half or twice, or other exact multiples, you retain the notes pitch identity, in a different octave. IOW you can overdub normal sounding instruments onto it in the same key. Maybe this was a consideration.