more midi output

ashes.ly

@@ -556,8 +556,8 @@ chordValues = \chordmode {
 
 }
 
-guitarOneStaff = \new Staff { \global \guitarOne }
-guitarTwoStaff = \new Staff { \global \guitarTwo }
+guitarOneStaff = \new Staff \with { midiInstrument = "electric guitar (jazz)" } { \global \guitarOne }
+guitarTwoStaff = \new Staff \with { midiInstrument = "electric guitar (jazz)" } { \global \guitarTwo }
 pianoStaff = \new PianoStaff \with {
   instrumentName = "Piano"
 } <<
@@ -596,6 +596,7 @@ chordNames = \new ChordNames {
 \score {
   \unfoldRepeats {
     <<
+      \vox
       \pianoStaff
       \guitarOneStaff
       \guitarTwoStaff