2008/10/8 Graham Percival <address@hidden>:
It's not in the docs because it's not lilypond. Consult the docs
for your MIDI player and/or synth.
LilyPond is for typesetting but it also has MIDI capabilities.
LilyPond's typesetting capabilities are expanded by Scheme and even
native PostScript markups.
In a similar way, MIDI capabilities could well be expanded to allow
arbitrary MIDI data to be output. Otherwise, all the effort in
instrument equalizing, sound selection etc, stays in a very limited
state.
For reverb, with a bit of luck it would suffice to send reverb type
and time events specified in General MIDI level 2 that fall into the
Universal System Exclusive type of messages (I've not tested it).
for example
F0 7F <device ID> 04 05 01 01 01 01 01 [pp vv] ... F7
where pp = 0 : reveb type; pp = 1: reverb time, and vv is the parameter value.
Please correct me if I'm wrong. Almost surey there is an easier way.