7 Dec
2002
7 Dec
'02
8:28 p.m.
On Saturday 07 December 2002 11:29 pm, David Olofson wrote:
[..]
I think velocity is special because it is often needed by the synthesis
algorithm only at the beginning of the note. For instance, if you have a
physical model of a bell then the velocity will determine the shape and
magnitude of the impulse function you use to represent the striker. Changing
it midway through the note, after the bell has been hit, is meaningless.
That said, it would be cool if you could support multiple velocity-like
parameters, so that it would be possible to control the position of the
striker and the strength of the strike independently for each note. Multiple
poly-aftertouch-like controllers would also be cool, but I think they are a
different thing.
MIDI has 2 velocities - note_on and note_off. I
see velocity as
specific to those two events. Isn't a new velocity event really a
new strike or attack of the instrument, or, in other words a new
voice (even if it cancels the previous voice)?
Nope. An a violin, you have no "velocity" event at all (unless you
want to use it for the subtle sound of the bow impacting or leaving
the strings), but rather a "bow speed" event - which is continous.
That said, I hate
that Velocity is special. I could be convinced. I could also
stand and argue. Not sure I know which I prefer...
Well, keep arguing, and I'll try to figure out more reasons why
velocity is not special, nor universal. ;-)