A beginner's guide to the components of a modular synthesizer - FAQ - Look Mum No Computer Thingies
The Music Telegraph] Basic Waveforms of Synthesizer: Pulse Wave
The auditory illusion behind pulse-width modulation, and how to avoid tuning inconsistencies in PWM patches (Synth/Sound Design Tutorial) : r/edmproduction
Workshop Modular Synthesizer: Pulsbreitenmodulation und mehr - AMAZONA.de