This pull request fixes Wine's MIDI synthesizer reset process to be the same as Windows'.
When playing Touhou Project games in MIDI BGM mode, the music playback becomes buggy when the BGM changes. The video below is an example of an anomaly that occurs when playing The Fantastic Tales from Tono after playing Crystallized Silver in Touhou 7. https://youtu.be/O69sndJ45Ag
Here's a correct example of The Fantastic Tales from Tono playback: https://youtu.be/XlFAQEbbNDg
Piano sound is clearly missing on Wine. This issue occurs due to an Wine's incorrect reset process for MIDI synthesizer.
When I ran FluidSynth on Windows and checked the log, I found that CC123 and CC121 were executed for each MIDI channel when switching songs. CC123 means All Notes Off, CC121 means Reset All Controllers.
-- v6: Corrected the comment. wineoss: Send All Notes Off and Reset Controllers. winecoreaudio: Send All Notes Off and Reset Controllers. winealsa: Send All Notes Off and Reset Controllers.