IMPORTANT MUST DO CHANGES ON GRAINS 1.3F
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1. CHANGE 100K TO 180K FOR PCV (1V/OCT)
INPUT. HAS WRONG SILKSCREEN VALUE.
THIS IS FOR MCP6002 OPAMP ON BOTTOM CENTER, RIGHT SIDE.
2. CHANGE 10NF TO 1NF ON SAME OPAMP, NEXT TO 47K.
THIS WILL FIX 1V PER OCTAVE TRACKING.
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FOR IMPROVED PITCH KNOB AND CV.
1. PLACE 100PF ON TOP OF 100K RESISTOR ON TL072, NEAR CENTER OF PCB, BETWEEN PITCH AND PITCH MOD CV KNOB. ON THE MCP6002 TO THE LEFT OF THAT CHANGE 10NF TO 1NF.

THIS WILL GET RID OF MODULATION JITTER ON PITCH KNOB.
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ON THE TOP CORE PCB, REPLACE TWO 100NF CAPS TO 10UF CAP TO MAKE 20UF VALUE FOR FILTERING CAPS OF 3.3VA REGULATOR