The Virtuoso Pianist, Part III
Scales in Octaves in the 24 Keys
Hanon notes
First practise each of these scales until it can be executed with facility; then play through all 24 without interruption.
We cannot too strongly insist on the absolute necessity of a proper wrist-movement; it is the only means of executing octaves without stiffness, and with suppleness, vivacity and energy.
In all scales in Octaves, the black keys are to be taken with the 4th finger of either hand.
Begin with the metronome set at 40, gradually increasing the speed up to 84.