michael moore

I am trying to improve a bit my thumb position technique. I am familiar with Petracchi's 3 positions: - chromatic (eg. G Ab A Bb with + 1 2 3)(*) - semi-chromatic (eg G A Bb B with + 1 2 3) - diatonic (eg G A B C with + 1 2 3) Among those 3 positions, the semi-diatonic is the one that feels...