Quantity   Component name
1 × Circuit Board
1 × tl084 Amplifier and Linear ICs / 4x Operational Amplifiers
1 × 14 pin ic socket 14 pin socket for housing the tl084
2 × Mini jack 3.5 mm female plug
1 × JST XH 3pin cable and connector
1 × JST XH 2pin cable and connector
1 × 20kOhm resistor
9 × 10kOhm resistor
8 × 104 ceramic capacitor
1 × 220uf electrolytic capacitor