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x0xlarge CPU, add midi cc support ?
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x0xlarge CPU, add midi cc support ?

by ProFête on Tue Jun 05, 2018 10:51 pm

hello

i was wondering if with a x0xlarge CPU it could be possible to control all pots of a x0xb0x via midi cc ?

thank
ProFête
 
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Re: x0xlarge CPU, add midi cc support ?

by antto on Thu Jun 07, 2018 12:50 pm

in theory yes, in practice it's not too easy:
- from first look, pins 61 to 58 are ADC0 to ADC3, and are not used
- some code will have to be written
- while the available ADC is 10bit, there's no DAC, so that must be resolved
- the potentiometers will have to be disconnected from the synth circuit and connected to the ADC channels
- the synth circuit will have to be modified - difficult

while the cutoff parameter is probably the easiest, the others are not so easy
you might have to use voltage-controlled-resistors or some other cleverness

it's also possible to use a dedicated mcu just for that task (perhaps a small one which has both ADC and DAC)
it can simply be connected to the same MIDI-IN data as the main mcu (but then there's a question about how you will configure this, if that's required)

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Re: x0xlarge CPU, add midi cc support ?

by ProFête on Thu Jun 07, 2018 2:36 pm

wow, impossible for me.

i think i will continu to dream about a x0xb0x fully midi controlable with savable presets
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Joined: Sat Jun 29, 2013 9:50 pm

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