Re: Issue 1548 in lilypond: midi output should map voices to channels

[lilypond]

Comment #5 on issue 1548 by jan.nieuwenhuizen: midi output should map  
voices to channels
http://code.google.com/p/lilypond/issues/detail?id=1548

Having voices mapped to channels would be ideal from a musical pov and this  
is what
the first implementation (8dc343b) did.
Now, it can be selected by setting #midiChannelMapping = #'voice.
The problem with this setting is that most midi players/devices
allow only one instrument setting per channel, per midi file (at a
certain time).  In theory, this can be fixed by playing each staff
to it's own track and port, this is what #'voice does, but most
midi players ignore that too.

In short; this issue had better be named: LilyPond should make
voices in midi output distinguishable.

In the current default, voices are mapped to tracks.  This accomodates
the midi2ly problem while retaining good midi playback.