Not sure about the performance on a Mac, but on a PC the arpeggio articulation plays back just fine.
Check that you are using the arpeggio articulation rather than a smartshape.
Check your Human Playback (HP) settings to see if a different one will provide playback.
Just checked this out on my Mac, and it worked with one caveat. An arpeggio will not work on the first beat of the piece since the program does not inherently provide the ability to anticipate the first beat.
Thanks for your help. Can you be more specific about where to find these buttons/menus on the mac platform? Perhaps arpeggiation is called by a different term? Adding an initial blank measure did nothing. What macOS are you running where you were able to see it?
Thanks, Mike. With your hint, I located the Articulation selection panel and tried a few experiments with the arpeggiation symbol.
1. It doesn't seem to work with chord symbols or individual notes, so it appears that I have to convert the chord symbols to notes.
2. I created a simple chord and tried changing the duration of the notes, & that had no effect. In fact, the dialog changed back to the default as soon as I reopened it. Perhaps there's another way of expressing a chord to get it to do what I want. I've found GarageBand to be very versatile in changing duration and direction of the arpeggiated chord symbol that was imported from SongWriter.
I used to compose on Songwriter and, because of incompatibility with the new macOS, have now been forced to go to Finale, a much more powerful tool than I really need. Then, I would arrange on GB. I'll continue to do that process with Finale & GB. When I found out Finale would arpeggiate, I wanted to explore the capability.