I have a super fast run for piano in two hands. In the middle of the run (which is like an almost glissando scale) the left-hand notes need to move up a stave. But when I do that, the two lines emerge, which I do not want. So I’m trying to achieve this:
Also I want to note that this is the first example I have seen of an octave line below the notes indicating the octave above!
For recopying, I would omit the octave line underneath and just let the upper line handle both, since they’re on the same staff and the meaning is obvious.
