Keith OHara schreef op di 15-03-2011 om 23:09 [-0700]:
> On Tue, 15 Mar 2011 13:53:41 -0700, Jan Nieuwenhuizen
> <jann...@gnu.org> wrote:
> It is, at least, the same kludge others (classicalmidiconnection.com)
> use when they have more than 16 simultaneous lines of music. To have
> some sympathy for the brokenness, remember that MIDI is primarily a
> delivery protocol to playback hardware.
Sure.
> I tried to summarize what the relevant classes do, and indicated the
> desired extensions in [[ ]] below :
> Objects of class Staff_performer correspond MIDI channels.
Not really:
* midiChannelMapping = #'instrument (default)
midiInstrument <-> MIDI channel
voice -> track
* midiChannelMapping = #'staff (old)
Staff <-> MIDI channel <-> track
voices are merged and unrecoverable
* midiChannelMapping = #'voice (nice, but unsupported)
Staff+voice <-> channel
midi-port <->Staff<->Track
(staff 1, voice 1 --> channel 0
2 --> channel 1
(staff 2, voice 1 --> channel 0,
etc.)
> Each Staff_performer has
> a channel number,
> optionally a MidiInstrument, midiMinimumVolume, etc.,
not really, these can change
> one [[or more]] objects of class Audio_Staff.
> This class implements the LilyPond performer "Staff_performer"
yes
> Normally each Staff_performer gets a unique MIDI channel number,
> [[ but if midiChannelMapping==#'instrument then Staff_performers with
> the same midiInstrument share a channel number. Program-changes and
> midiVolume events from each Staff_performer will affect the shared
> MIDI channel.]]
Yes, although normally is [[ ...]] is the default.
> Staff_performer is responsible for routing Audio_items to the
> appropriate Audio_staff.
Yes
> Normally there is one Audio_staff per Staff_performer,
for 'staff and for 'voice, not for 'instrument
> [[ but if midiTrackMapping==#'voice then each uniquely-named Voice has
> its own Audio_staff.]]
no, that's for 'instrument
> I still have the net change to midi output at
> http://codereview.appspot.com/4271043/ in case it is useful.
Ok.
> Should the Audio_staff be "promoted" to Track_performer, in Voice
> context by default, and collect its own Audio_items?
> Do you still want all those maps ?
Not sure, if it works and is nicer, I'm all for it. However, I
do want to keep these three output options for now.
Jan.
--
Jan Nieuwenhuizen <jann...@gnu.org> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | Avatar® http://AvatarAcademy.nl
_______________________________________________
lilypond-devel mailing list
lilypond-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/lilypond-devel
