> Or playing PCM on the old PC speakers having only on/off beep function That is PWM, pulse width modulation. https://en.wikipedia.org/wiki/PC_speaker#Pulse-w

> Or playing PCM on the old PC speakers having only on/off beep function That is PWM, pulse width modulation. https://en.wikipedia.org/wiki/PC_speaker#Pulse-width_modulation https://en.wikipedia.org/wiki/PC_speaker#Pulse-width_modulat...