26 Sep
2009
26 Sep
'09
8:56 p.m.
Nick Copeland wrote:
I would not put too much emphasis on the ms delays and
traffic volume
generated by these messages. It has been generally agreed that the
bandwidth
of MIDI would have killed it a long time ago had it not been for
'integrated'
systems that passed MIDI internally hence had no bandwidth limitations and
that MIDI/USB is keeping it alive today. The device you are talking
about has
a USB connector which can be used at a later date when you need bandwidth
so perhaps concentrate on functionality for now? Just a suggestion.
Yes the master keyboard might get an USB connector, but master keyboards
are used to control a set up of equipment and MIDI still is the
standard. But anyway you're right, there's always the possibility to use
more than one MIDI port and than MIDI is fine even with heavy traffic.
b. it is generally low resolution so you hear each
step in pressure change
I guess this is a problem when you e.g. will control the volume, but
controlling the volume by pressure seems to be grotesque. Normal usage
might be the depth of LFO vibrato, but I do agree, in some cases e.g.
for controlling filters this can become a PITA.
Bad targets:
Volume/gain, filter cutoff, FX depths, : All of these might be normal for
note-on velocity but are very bad selections for note-off. They cause
pops
and clicks when key-on velocity is very different from key-off velocity.
Seems to be plausible, resp. such targets need a fix note on value,
while the note off velocity will change this value, but for most cases
this seems to be groteque.
Potentially good targets:
ADSR release rate.
For the release rate this seems to be plausible.
LFO speeds
E.g. the way a rotary speaker simulation should become slower.
I think one of the reasons that many synths have
avoided doing anything
with note-off velocity is that the typical targets are not the same as
with
note-on velocity hence there are some semantic issues associated with how
they need to be directed. Most synths have 'velocity sensitivity', but
if it is so
glib that both values control the same parameter then the results will
not be
what you are probably expecting: they should vary rarely be directed
to the
same synth parameter.
Good thoughts :). I guess you've got experiences with note off velocity.
I've got experiences with MIDI for around 25 years, but no experiences
with note off velocity and key pressure.
Your thoughts might be important for people who program virtual synth
for Linux.
Ralf