devices :: Korg Volcas (modded)

Modifications of Korg Volca Bass and Korg Volca Beats by K'sadhu

Features of Volca Bass[ show / hide ]

  • added MIDI output on 1/8" (3.5mm) TRS mini-jack socket
  • added 3 separate VOLUME knobs, 1 for each oscilator
  • added a DRIVE knob on output
  • added a FM knob for frequency modulation of filter cutoff by the oscilators sum

Features of Volca Beats[ show / hide ]

  • added MIDI output on standart 5 pin DIN-5 socket
  • added 5 separate 1/8" (3.5mm) TS mini-jack OUTPUTs for each drum part
    (note: all 4 PCM sounds are togather on one output)
  • modified the SNARE sound by softening the attack of it's envelope
  • added BRIGHTNESS knob for snare
  • added HAT/TRIANGLE switch for the hats' sounds

PCB and schematic sketches with mods:

Korg Volca Bass - schema
Korg Volca Bass - mods
Korg Volca Beats - IC7
Korg Volca Beats - IC8 & IC13
Korg Volca Beats - IC9 & Q9-Q14
Korg Volca Beats - IC10
Korg Volca Beats - sketch 1
Korg Volca Beats - sketch 2
Korg Volca Beats - sketch 3

* NOTE: While reading the sketches check for corrections, for those are the oryginals from the research.
Better, clean drawings might come some day...