1.sub.ground.... 2.ground.... 3.muting.... 4.vcc-.... 5.vcc+.... 6.input 1.... 7.non inverting in 1.... 8.vcc-.... 9.output 1.... 10.vcc+.... 11.output 2.... 12.vcc-.... 13.non inverting in 2... 14.input 2.... 15.input 3... 16.non inverting in 3.... 17.vcc-.... 18. output 3....
