General MIDI Support

Your idea

Musescore 3 contained PORT, CHANNEL, VOLUME, PAN, REVERB, CHORUS, PROGRAM CHANGES, is it possible to bring the back?

Problem to be solved

MIDI export bugs, midi inaccuracy before export, resolve GM compatibility. In version 4 some midi exports work notably with breath controller, and finnicky program changes (not 100% accurate), and some guitar notations break the midi file notably scoop, and the dip pitch bends down but doesn't always return to 0. Internally Musescore 4 channels appear based on order rather than assignable, making drums (channel 10 in GM) inaccurate unless it's the 10th channel.

Prior art

No response

Additional context

Intended Goal: Notate music in muse score and listen live to composition on 90s GM modules such as Roland SC88, or Yamaha Mu50, as well as having more accurate exports. (Full CC automation is done outside in a DAW, but with what Musescore includes it is finnicky.)

Checklist

• This request follows the guidelines for reporting issues
• I have verified that this feature request has not been logged before, by searching the issue tracker for similar requests

Start by tracing the MIDI export and channel-assignment entry points, then reproduce the reported program-change, drum-channel, breath-controller, and pitch-bend behavior. Compare the current behavior with General MIDI expectations and the listed MuseScore 3 controls. Done means accurate live playback and exports for the requested General MIDI features without breaking guitar notation.