As you know, in the melodic minor scale the sixth and seventh notes are raised as you ascend. In the natural form of G# minor, the seventh scale degree is F#. In order to raise it a half step, yet keep it on the F line of the staff, we use a double sharp: x. Fx is enharmonic with G. What note is enharmonic with E#, the sixth scale degree?

Double flats also exist, and are indicated by two flat signs before the note: bb. Subdivide eighth note triplets as you play the quarter note triplets.