I'd suggest either moving the DynamicsPerformer to the Staff context or
replacing the \upper with << \upper \dynamics >> (and the same for \lower).
Normally, dynamics only affect the voice they are in, which in your example is
a different voice from the ones the notes are in.
On 02/04/18 01:55, Hilary Snaden wrote:
> I have been trying to get LilyPond to generate MIDI versions of some piano
> music. The music script renders nicely, and there are no errors or warnings,
> but the MIDI file plays with no dynamics at all. What am I doing wrong?
> (LilyPond 2.18.2.)
>
> \score {
> \unfoldRepeats
> \new Staff
> <<
> { \tempo 4=86 }
> \new Voice = "v1" {
> \set Staff.midiInstrument = "Acoustic grand"
> \set Staff.midiMinimumVolume = #0.2
> \set Staff.midiMaximumVolume = #0.8
> \upper
> }
> \new Voice = "v2" {
> \set Staff.midiInstrument = "Acoustic grand"
> \set Staff.midiMinimumVolume = #0.2
> \set Staff.midiMaximumVolume = #0.8
> \lower
> }
> \new Dynamics \pianodynamics
> >>
> \midi { }
> }
>
>
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