Just experienced lots of problems trying to set the instrument used to play chords. The documentation doesn’t say much about that, no examples, no detailed explanations. Only a kind of generic sentences
In my jazz score, only one flow, there was an empty piano part with the chord symbol and the chord notes… set to be played with a Halion SE piano in channel 4. All of that more or less automatically. later one on.
I then removed the piano part and added the chord symbols to the staff to another instrument, say the bass. What that just to be able to print the tune score on 2 pages.
I then set channel 4 as the channel to play chords. since a piano instrument was loaded into it. That worked. But wanting to use another sound, say an organ for a more sustained and sweet less percussive sound, I changed chord channel to 7 and tried to load an organ sound program into it.
Never worked, no sound, and even sometimes Dorico crashed. No idea of what to do, except recreating a new organ part in a duplicate score of course, but that’s a bit heavy when what I see on screen let me believe I could just use a simple approach.