R1 4.7K Q1 C1815 R2 220K Q2 C1815 R3 470K Q3 C1815 R4 10K Q4 A1015 R5 470K Q5 K30A R6 1M Q6 K30A R7 1K R8 500K LOG POT D1 ? R9 10K D2 ? R10 27K D3 ? R11 27K D4 ? R12 500K LOG POT R13 100K IC JRC - 4558D R14 100K R15 220K R16 500K LOG POT R17 220K R18 220K R19 470K R20 15K R21 1M R22 100K R23 12K R24 6.8K R25 1M R26 1M R27 10K R28 220K R29 1K R30 47K R31 47K C1 .022uF C2 47pF C3 .022uF C4 47pF C5 .47uF/50V C6 1uF/50V C7 .0047uF C8 .01uF C9 .047uF C10 .047uF C11 .047uF C12 1uF/50V C13 1uF/50V C14 .022uF C15 .01uF C16 10uF/16V C17 100uF/16V C18 10uF/16V