25 Jun
2010
25 Jun
'10
7:07 p.m.
On Fri, Jun 25, 2010 at 9:29 AM, Clemens Ladisch <clemens(a)ladisch.de> wrote:
there are 3 pages (minimum) of discussion of this behaviour in the
MIDI spec. there are at least 4 options for how a receiver can behave.
James Morris wrote:
I have the full MIDI spec in front of me. It states very clearly that
a sender MUST always send a note off for every note on, regardless of
whether a receiver pays any attention to it.
1) Notes of zero duration?
Are these legal MIDI?
Yes. There are synthesizers that can play percussion sounds at their
natural length and ignore note-off messages, so, sometimes, note-off
timing isn't available.
Do I send a note-on with simultaneous note-off?
Yes. Some standards say that each note-on must have a corresponding
note-off. 2) note x ending simultaneously with note y
beginning
For example, a sequence of eighth notes, each an eighth in duration.
As far as processing of these events goes, which should be processed first?
This depends. It is possible that a synthesizer plays these notes in
legato for certain instruments, but only if the note-on of the second
note is received before the note-off of the first note. And it's
possible that certain other notes are _not_ intended to be played legato.