Re: [Denemo-devel] midi input

[Nils Gey]

The idea of having immediatly playbacked the note is nice, however it should be 
the users choice to turn it off/on since I, for example, absolutly don't like 
it. And if I need it I normally have my Midikeyboard connect to ZynAddSubFx or 
Linuxsampler so I get sound anyway, without Denemo. Please note that with JACK 
its no problem to route your midi-input to denemo and some other programm at 
the same time.

To the JACK-output. Do you mean JACK-audio output for the (CSound?-)playback or 
do you mean midi output?
For the midi-output I agree that there has to be some amount of time to be 
spent. Midi-output is not a easy thing and it should be well designed with 
proper reactions to the Denemo-commands. Also there would be a massive amount 
of new functions needed, for example tempo-changes/metronome-changes which 
would be recognized by both Lilypond and midi, and universal-functions to 
directly alter midi-commands, like the lilypond-entry function is now used for 
lilypond. 

If Denemo should be able to output midi, which could be really amazing, then it 
should be done properly. And if you ask me its a post 1.0 thing :)

Nils


On Wed, 05 Nov 2008 08:27:42 -0600
Jeremiah Benham <address@hidden> wrote:

> On Wed, 2008-11-05 at 08:13 +0000, Richard Shann wrote:
> > I have plugged in my m-audio keystation 49 and doing
> > cat /dev/midi
> > I can see the midi data coming in as I press the keys.
> 
> We can a universal function that responds to midi messages NOTE_ON,
> NOTE_OFF, PITCH_BEND, etc... and if jack is not available we can default
> to oss. Alsa does oss emulation so the user just has to provide the
> device path /dev/snd/midi02, /dev/midi or whatever. 
> 
> > It looks like for the non-jack branch we could possibly just collect the
> > simplest "noteon" data and use it as pitch input for Denemo. 
> 
> You are going to want to process it to determine if the input is
> overlapping or if the foot pedal has been pressed. 
> 
> > This would
> > still leave the question of how to get midi out, though. 
> 
> There is already some code written for this. Users who have a hardware
> synth on their card can have immediate playback as notes are entered.
> Unfortunately the code is broken at the moment. If
> gui->si->prefs->immediateplayback is TRUE notes entered dnm_insertchord
> calls playnotes() defined in midi.c. The call to playnotes it commented
> out at the moment because it was broken. I am not sure how this works
> exactly its using /dev/sequencer to write to. I believe it is then the
> responsibility of your alsa drivers from there on. 
> 
> > You need some
> > output as you play the music in as audible feedback that you have hit
> > the right note.
> 
> Would we add jack output to the release also?  I could probably have it
> sending out notes that are entered immediately. I could not do a full
> score playback via jack without dedicating some time to it though. I
> would want to get playnotes() working first anyway.  
> 
> Jeremiah
> 
> > It's not that I am avoiding getting jackmidi working on my computer,
> > just a question of finding more than the odd half-hour to work on it.
> > (You may have noticed that I keep doing lots of small things, for this
> > reason).
> > Richard
> > 
> > 
> > 
> > 
> > _______________________________________________
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> > address@hidden
> > http://lists.gnu.org/mailman/listinfo/denemo-devel
> 
> 
> 
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-- 
Nils Gey <address@hidden>