PDM — pulse density modulation — is similar to PWM and ... PWM was one choice, and some example code uses a timer to do PDM. However, that is not very efficient. The other alternative is ...

The 8-Channel PCM-to-PWM Modulator is a digitally coded conversion IP that translates 8-ch (4 stereo channels) of 16-24bit pulse-code modulated (PCM) input data into pulse-width modulated (PWM) ...