\context Voice = corII { \stemDown \M }
>
\context Staff = trp <
- \property Staff.instrument = "2 Trp. in B\\textflat "
+ \property Staff.instrument = #`(columns "2 Trp. in B " (music "accidentals--1"))
\property Staff.instr = "Trp."
\context Voice = trpI { \stemUp \M }
\context Voice = trpII { \stemDown \M }