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J4, J5 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling)"/> Dual Operational Amplifiers, DIP-14/SOIC-14 Low-Power, Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | | | | | Tayda | A-1157 or A-2425 | | S3 | 1 Kosmo_panel | 1 | Conn_01x04 | Pin header, 2.54 mm, 1x2 (see [build notes](build.md)) | | | | R4, R6, R7 | 2.

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