Internal MIDI soundfont

[Raffaello Grani]

Two bugs with XWVM’s internal MIDI soundfont:

1st: It is too quiet compared to external soundfonts like Patch 93’s SC-55 or Timbres of Heaven
2nd: At least in X-Wing in a build only, it plays cymbals when it’s supposed to play drums and these cymbals don’t stop. In the editor and in TIE Fighter, the cymbals only play when they’re supposed to and they get stuck only for a second or two.