U1 TL074 Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 C1,C2 10uF Polarized capacitor J1-J6 A Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) J7-J10,J12,J13 B Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) J11 EXT_INTERFACE_1 Generic connector, single row, 01x30, script generated (kicad-library-utils/schlib/autogen/connector/) J14 Daughter Generic connector, single row, 01x30, script generated (kicad-library-utils/schlib/autogen/connector/) J15 INPUT A Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) J17 INPUT B Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) J19 SEND A Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) J20 SEND B Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) J21 RETURN A Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) J22 RETURN B Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) J23,J29 EXT_INTERFACE_2 Generic connector, single row, 01x30, script generated (kicad-library-utils/schlib/autogen/connector/) J24 Blend Out Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) J25 A1 Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) J26 A2 Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) J27 B1 Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) J28 B2 Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) R1,R2,R5,R6,R11,R12 1k Resistor R3,R4 20k