It's actually more complex than that. I read somewhere that the RT's are recorded three times with each one being a third or fourth apart. This could be different because of the instrument. Some lend themselves to pitch shifting better than others.

If it's a fourth apart like C, F and Bb and your chord is an Eb then the program could go up a minor third from the C or down one step from the F. This is where the internal magic happens.

To the question can you hear this shifting the answer is no you can't or at least most can't. I suppose if you isolate one track and give it to a young recording engineer with great ears maybe he could. This became possible just a few years ago when newer software was developed that did this much better than before.

Bob

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