Hi there, Boy was that one hard to track down.
Try this with and without the \new Voice commented. \version "2.25.12" \language "english" \score { %\new Voice << {bf bqf bf} {g gqs g} >> \layout {} \midi {} } Obviously you would need to listen to the MIDI output. The thing is that I'm shifting a g:min chord a quarter tone up, for just one beat. And in the score it does sometime happen like this : hornI = {bf bqf bf} hornII = {g gqs g} \partCombine \hornI \hornII I understand why (pitch bend and all) but can this be circumvented in (maybe) a graceful way ? Is the base code to blame ? I hope 2024 brings you everything you need. -- *Pierre-Luc Gauthier*