I've been having some trouble getting the Master Tuning RPN to have any effect in BASSMIDI. I saw the change log note from >15 years ago (and a couple forum topics from around the same time) saying that they should be implemented, so I'm sure I'm just missing something.
When I send this stream of MIDI messages, the Microsoft GM Synth will change the tuning of all notes on that channel, but BASSMIDI does not:
B0, 64, 02
B0, 65, 00
B0, 06, 20
B0, 26, 00
B0, 64, 7F
B0, 65, 7F
Please let me know where I'm going wrong. Thanks!