Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

I am about to get serious about writing the code that implements MIDI
controllers for all of the Poly 800 parameters. The controllers would
edit the current sound parameters and would require "writing" to a
specific patch in order to make the current sound permanent in one of
the 64 patches.

Some of the controllers will be set up specifically according to a
well known controller. VCF, resonance, portamento time, etc all have
assigned controllers. I will write the code so that those specific
MIDI controllers work for those well known controllers.

Now, given that there are about 50 to 60 original parameters to edit
and another 64 potentially in extended parameters, I think it makes
sense for us to just assume that we'll be dealing with about 128
different controllers. Also, the parameters are kind of set up in
blocks of eight. And furthermore, global mode uses up to 64 different
parameters too.

So I was thinking about assigning controller 22 to be a parameter bank
select. Controller 22 would use a range of values from 0-16 (anything
above 16 would be ignored). Then Controllers 23 to 31 would be
parameter controllers for parameter 0 through 7.

For example, set Controller 22 to 4 would select the EG1 parameters
for editing. Then, you would edit attack, decay, bp, slope, sustain
and release by using controllers 23-29 (30 and 31 would not be active
because the EG parameter bank only has six parameters to edit). So 23
would edit the attack through to 29 would edit release.

If you want to edit EG2 parameters you would send controller 22 with a
value of 5. Then use controllers 23-29 to edit EG2 parameters. Once
again, 23 would control attack through 29 would control release.

Using this model, we can use nine knobs on a controller to edit all of
the parameter "banks". The banks would be 0-7 for the original
parameters, 8-15 for extended parameters and 16 for global parameters.

So just about any MIDI controller that has nine assignable knobs could
edit all of the parameters in the Poly.

Hmm, maybe I should just leave out the global parameters.

What does everyone think of that method?

Mike.