I’m trying to transcribe a piano piece (Rachmaninoff 3 first mvt) that has several sections that are most easily written as polyphonic passages with different voices.
As an example, from https://s9.imslp.org/files/imglnks/usimg/5/59/IMSLP248685-SIBLEY1802.18602.bfe9-39087009348535score.pdf, starting at rehearsal mark 2 on page 5. I would like to have the lower voice use kneed beams as in this score, but if I use \voiceOne and \voiceTwo for the two voices, the second voice has all down stems regardless of the value of auto-knee-gap. How can I write polyphonic voices, but control the beam direction in the second voice when necessary? And can I force a kneed beam if auto-knee-gap isn’t doing it? What is the meaning of the value of auto-knee-gap, by the way? Is it staff spaces? What about when you change staffs? What if the two staffs are in the same clef and you jump from a note in the bottom staff to the same note in the upper clef? Thanks for any information.