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Csound options for midiout

I am using a KORG nanoKONTROL2 controller and wanted to control the LEDs from an instrument by midiout. I did not get this to work, so I wrote a small test file:

form caption("Untitled") size(400, 300), guiMode("queue"), pluginId("def1")
keyboard bounds(8, 158, 381, 95)


; These options allow controlling the LEDs but do not trigger instrument 1 from MIDI:
; -n -d -M0 -m0d -Q2
; Standard Cabbage options: trigger the instrument, but don't control the LEDs:
-n -d -+rtmidi=NULL -M0 -m0d --midi-key-cps=4 --midi-velocity-amp=5


; Initialize the global variables. 
ksmps = 32
nchnls = 2
0dbfs = 1

;instrument will be triggered by keyboard widget
instr 1
kEnv madsr .1, .2, .6, .4
aOut vco2 p5, p4
outs aOut*kEnv, aOut*kEnv

instr 99

kstatus, kchan, kdata1, kdata2 midiin
if kstatus!=0 then
  printks "Status: %i, Channel: %i, Data1: %i, Data2: %i\n", 0, kstatus, kchan, kdata1, kdata2

midiout 176, 7, 32, p4



i99 0 1 127
i99 1 100 0


There is one MIDI-playable instrument (1) and another one (99) which is played from the score and should switch an LED on/off by midiout. The latter also monitors all incoming MIDI messages by midiin and prints them to the console.

What I noticed is that if I use the standard Cabbage options for Csound instrument 1 plays but the LED is not activated. (I checked that in the Cabbage settings MIDI Output is set to “nanoKONTROL2 1 CTRL”.) But the midiin works.

After some fiddling I found that removing -+rtmidi=NULL from the options and adding -Q2 for assigning the MIDI output lets me control the LED. But then instrument 1 cannot be played from MIDI anymore.

I tried to find a combination of options which work for both with no avail.

[I am not sure whether this is really a bug. I don’t fully understand the MIDI assigment mechanisms of Csound and Cabbage. So it may simply be that I am not using the right options.]

The Cabbage IDE does not output MIDI. If you remove the -+rtmidi=NULL, then you are asking Csound to output MIDI directly, which means that it will no longer behave correctly in Cabbage. Best might be to do this through a host that can output MIDI.

From my other post of today you may have seen why I asked. It would be nice if the LEDs on the controller reflect the state of the buttons. But even if MIDI out would be possible it would be tricky because the buttons can be changed not only from the controller but also from the GUI or a cabbageSetValue command.