The record turntable speed trick, in which the selected speeds were intentionally chosen such that each one would replicate the analog music at octave intervals and exact half or doubled speeds, was the way to do it at one time, certainly.

The same applied to analog tape speeds as well.

I find that I do appreciate not having to deal with the slowed down passage also being one octave lower, though. Much easier to differentiate notes that way IMO, plus the fact that I can use digital audio files, mp3's, etc. and even youtube published recordings for the purpose of transcription, practice and learning.

Whatever method you like to use, the most important aspect of the thing is that the way to improve your skills rapidly and with efficiency is to Transcribe, Transcribe and Transcribe.


--Mac