What MIDI messages should this send? (new instrument)


Joined
Sep 23, 2013
Messages
7
Reaction score
0
Hi everyone,
I'm currently working on the firmware for a new instrument (http://therevox.com/et-4.3/), so I'm trying to decide what MIDI commands the instrument should be sending. I figured since it's still in development, it would be a good time to ask for some opinions.

The instrument has a pitch ring that spans nearly 4 octaves and two "intensity" keys that control volume for two oscilllators.

The position of the pitch ring is being sent as a pitch bend using the full 14 bit MIDI message, this gives an accuracy of about .002" so I'm happy with that.

There are 4 modes of MIDI operation, so I've set them as :

MODE 0: +/- 24 semitone pitch bend on 1 midi channel
MODE 1: +/- 24 semitone pitch bend on 2 midi channels
MODE 2: +/- 12 semitone pitch bend on 1 midi channel
MODE 3: +/- 12 semitone pitch bend on 2 midi channels

The 24 or 12 semitone pitch bend is because I'm noticing a lot of software synths don't allow a +/- 24 semitone pitch bend (even though it's specified in the MIDI specs) and seem to max out at +/- 12 semitones.

I'm also occasionally trying to send the appropriate "Pitch Bend Sensitivity" registered parameter, but I haven't found anything that actually listens to it. Maybe I'm sending it wrong? I'm sending:

24:0 Control change 0, controller 101, value 0
24:0 Control change 0, controller 100, value 0
24:0 Control change 0, controller 6, value 24

The modes with 1 midi channel trigger notes on CH 1 only, and the modes with 2 midi channels have intensity key 1 trigger notes on CH 1 and intensity key 2 trigger notes on CH 2. The idea here is that separate software synths/devices can be assigned to each channel.

Here is the table of commands I'm currently sending

MODE 0
ring - +/- 24 semitone pitch bend CH 1.
key 1 - Note On/Off CH 1, CC 20 CH 1.
key 2 - CC21 CH 1.
oct switch 1 - changes note octave CH 1, sends bend range sensitivity (24)
oct switch 2 - CC 24 CH 1
exp - CC4 CH 1.
osc2offset - CC22 CH 1.


MODE 1
ring - +/- 24 semitone pitch bend CH 1, CH 2.
key 1 - Note On/Off CH 1, CC 20 CH 1.
key 2 - Note On/Off CH 2, CC 21 CH 2.
oct switch 1 - changes note octave CH 1, sends bend range sensitivity (24)
oct switch 2 - changes note octave CH 2
exp - CC4 CH 1, CH 2.
osc2offset - CC22 CH 2.


MODE 2
ring - +/- 12 semitone pitch bend CH 1.
key 1 - Note On/Off CH 1, CC 20 CH 1.
key 2 - CC21 CH 1.
oct switch 1 - changes note octave CH 1, sends bend range sensitivity (12)
oct switch 2 - CC 24 CH 1
exp - CC4 CH 1.
osc2offset - CC22 CH 1.


MODE 3
ring - +/- 12 semitone pitch bend CH 1, CH 2.
key 1 - Note On/Off CH 1, CC 20 CH 1.
key 2 - Note On/Off CH 2, CC 21 CH 2.
oct switch 1 - changes note octave CH 1, sends bend range sensitivity (12)
oct switch 2 - changes note octave CH 2
exp - CC4 CH 1, CH 2.
osc2offset - CC22 CH 2.



Sorry for the long post! Does all of this seem good, or are there some changes you'd like to see?
 
Ad

Advertisements

happyrat1

Destroyer of Eardrums!!!
Joined
May 30, 2012
Messages
12,084
Reaction score
5,012
Location
GTA, Canada
It'd be nice if it had a numeric keypad and a 4 digit 7 segment display so you could send patch numbers and sysex commands to the MIDI output module.
\
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top