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Lib="ao_symbols" part="SW_3PDT_x3" description=""/> Dual Operational Amplifiers, DIP-14/SOIC-14 | | U1 | 1 | 1uF | Film capacitor | | R21, R22, R23 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) | | D1, D2 .