[chbot] MIDI over USB for nanoKONTROL2 control surface

[Mark Atherton]

Hi All,

Hopefully someone here can save me some work digging around for a 
solution to this question:

I am building a small wireless interface for a KORG nanoKONTROL2 
MIDI-over-USB control surface. The system is based on a Microchip 
dsPIC device with USB host port, so far so good; everything works as 
expected in terms of controlling LEDs on the control surface, and 
reading back sliders, knobs etc. as Control Change messages.

As an example, after moving a slider, a message is received like 
0x0B, 0xB0, 0x02, 0x78 -- Cable 0, Control Change, Address 2, Data 0x78, etc.

I need to be able to read the whole control surface at power up, so 
for example I need to know how to interrogate slider 2, to find it's 
current position without moving it.

Any ideas how I go about doing this will be appreciated, or a more 
appropriate forum.

Thanks,

Mark