Re: [Denemo-devel] midi input

[Jeremiah Benham]

On Fri, 2008-11-07 at 20:26 +0000, Richard Shann wrote:
> On Fri, 2008-11-07 at 13:48 -0600, Jeremiah Benham wrote:
> > > I press the a key, and (strangely) the same but with velocity 0 each
> > > time I release a key. (The MIDI standard says it should be NOTE_OFF
> > > (0x80) with the velocity of the release).
> > > Where to go with all this?
> > 
> > I read that sending a NOTE_ON signal with velocity 0 is very common.
> > We
> > should have a switch for to treat it as if it was NOTE_ON. I noticed
> > that the other day when I actually had a chance to test it on a my
> > midi
> > controller. Denemo entered each note twice because my controller was
> > also giving a NOTE_ON with velocity 0. 
> I am also getting a single 0xFE byte (something to do with overlapping
> notes?), I can't find a nice simple table giving what to expect. The
> input method I have used needs to know how many bytes are coming. Do you
> know of an easy-to-read guide, or indeed are there some parsing
> functions in importmidi.c for the relevant bits - I'm guessing that the
> same MIDI messages are embedded in the midi file format?

All the info you need about midi at:

midi.org

A direct link to midi messages and what they mean is here:

http://www.midi.org/techspecs/midimessages.php

This link has more info about a bunch of other midi stuff:

http://www.midi.org/techspecs/index.php

Jeremiah



> 
> Richard
> 
>