Roland sound module as midi output.
In the assumption that it may be useful I report from a conversation on the other side of the pond.*
'using a Roland sound module as a midi output some instruments are changed in midi playback...This happens only with MUSESCORE 3, while with VANBASCO for example it does not happen.'
Roland Support's response:
'apparently MuseScore does not send the correct Programme Change & Bank Select commands to Sonic Cell...list of all Programme Change & Bank Select commands used by Sonic Cell'.
