SX-150 UNDER MIDIVOX CONTROL - A FIRST ATTEMPT

04.29.2010


After a request in the forums, I took a stab @ generating control voltage for the ever-lovable Gakken SX-150 mini analog synth. This initial sketch will convert MIDI note values 47-84 into varying pitches w/ envelope triggers on the SX. Those interested can grab the code here -

http://narbotic.com/files/MidiVox_SX150-100428a.zip

Hardware Setup:
  • Switch the MidiVox AUD/CV jumper over to CV side (connecting the center and inner-most pin)
  • Connect the shield’s signal output (left or right channel from the onboard 1/8” output jack) to the metal contact on the SX-150 stylus.
  • Also, make a connection between GND on the shield to any ground point on the SX-150 (the exposed metal barrels on either of the SX 1/8” jacks will work)


The notes played won’t be in tune (that’s a tall order for the lil’ SX), but I’ve found that using a keyboard to control the Gakken is a lot big improvement compared to the standard stylus/ribbon interface.
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