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For those who don't know, when changing the key on the sax, the fingering is entirely different. So learning a song in one key, and then modulating it up a half step, is like learning the song all over again.

Well, yeah.
Same with a lot of other instruments. Moving up a half step on any brass instrument is totally different too (and to be honest may affect my note choices at times, not because of the note, but because how that fingering would sound ..)

I do not work here, but the benefits are still awesome
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