DIY Drone Synth 20210508

hand made drone synth 5 oscillators 74HC14 (schmitt trigger inverter) 1,2 triangle ,sawtooth with sub oscillator 3,4 pulse width 5 pulse width modulation 2 resonant Low pass gate 2 keys 2 step sequencer ch1 diode mix ch2 resistor mix key control and sequencer :PIC16F1765 low pass gate :vactrol