midi performance hacking

[Michael Welsh Duggan]

The included file demonstrates one of the things I want to do on a
general basis: to be able to determine at what context levels midi
tracks are aggregated upon.

It would be nice if this were less tortuous, and didn't require
making a new type of Staff.  Can anyone think of a good way to do
this?  (Doesn't necessarily have to be possible in current LilyPond.
Something which makes good sense which could be implemented would be
just fine.  Of course, I am volunteering to help with
implementation.)

\include "english.ly"
\version "2.2.3"

\score {
    <<
        \new StaffTrack \notes a'1

        \new PianoStaff 
        <<
            \new Staff \notes a'
            \new Staff \notes {\clef bass a}
        >>
    >>
    \paper { raggedright = ##t }
    \midi {
        \context {
            \ScoreContext
            \accepts StaffTrack
        }
        \context {
            \name StaffTrack
            \accepts Voice
            \type "Staff_performer"
            \consists "Key_performer"
            \consists "Tempo_performer"
            \consists "Time_signature_performer"
        }
        \context {
            \StaffContext
            \type "Performer_group_performer"
            \remove "Key_performer"
            \remove "Tempo_performer"
            \remove "Time_signature_performer"
        }
        \context {
            \PianoStaffContext
            \type "Staff_performer"
            \consists "Key_performer"
            \consists "Tempo_performer"
            \consists "Time_signature_performer"
        }
    }
} 


-- 
Michael Welsh Duggan
(address@hidden)