Recently a similar application I’ve done, but ds1844 integrated can not be found had been a problem AVR reviewing ATtiny2313 `fame four PWM channels, saw direct this practice came to my mind bass treble balance sound ATtiny2313 4pwm channel... Electronics Projects, Digital Tone Control Circuit Atmel ATTINY2313 LM1036 "avr project, microcontroller projects, " Date 2019/08/02