Author: kdk ★2017
Date: 2022-08-16 18:01
Are these home-grown warmups or are they published? Most published scales I've seen with fingerings either show the ones you've described or they have both ways printed (one above the other, usually with a recommendation to practice both ways).
I think the L-R sequence for C, G, D and A major build on the (to me) obvious design intention that RH C be the normal fingering to use in a native C major scale. It makes logical sense, then, to use LH B(4) whenever the next note needs a lever that's available on the right hand. As you've said, this needs to change *as a standard fingering* when D#(Eb)5 or G#(Ab)3 is involved (E, B, F#/Gb).
If the only fingerings in the warmups you're seeing are RHB-LHC, and it isn't marked the other way in other exercises on the same scales (to support practicing both), I'd wonder what instrument the person who created the warmups plays.
Karl
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