{
 "_sources": [
  {
   "type": "vendor-doc",
   "url": "http://www.musictechnologiesgroup.com/files/DX7_4x_Exp_UserGuide.pdf",
   "notes": "DX7-4X-EXP User Guide v2.11 (Music Technologies Group)",
   "firmware": "mtg-4x-exp-2.11",
   "imported_at": "2026-10-26"
  }
 ],
 "_limitations": "DX7_4x_Exp (built on Yamaha ROM 1.8) shares the DX7 MIDI: 128 patches by Program Change 1-128; MIDI out channel, Local on/off and a per-patch keyboard split with one MIDI channel per zone set on the unit; velocity offset. Sold as hardware by its maker; nothing is hosted here. Untested on hardware.",
 "midi_of": "yamaha/dx7.knobkraft.fw-unknown",
 "device": {
  "name": "DX7",
  "vendor": "Yamaha",
  "revision": "DX7-4X-EXP User Guide v2.11 (Music Technologies Group)",
  "osc_prefix": "/dx7"
 }
}