I’m writing a piece that has a jazz horn trio (trumpet, alto sax, trombone) in the ensemble. Playback is fine and normal as long as I don’t include basic articulations (accent, marcato, staccato, tenuto, etc.), but as soon as I do, playback adds a low, blatty, tuba-farting noise to it. This only happens with the brass GM sounds ([GM 057] Trumpet, [GM 058] Trombone); other brass patches are fine.
Running Dorico 18.104.22.168 on macOS Sierra 10.12.6, 2017 27" 5K iMac.