This page was last modified 14:30, 26 May 2023 by Mars2000you. Based on work by Gdx.


PCM means Pulse Code Modulation, it is used to digitally represent sampled analog signals.

There are various PCM systems for MSX but only that of MSX-AUDIO has been integrated into the standard optionally up to MSX2+.

Another official PCM system with timers replaced it as standard on MSX turbo R computers. This system has been used very rarely and when it was done, it was without using a timer.


  • PCM can be played for cheap with the SIMPL/Covox DIY hardware
  • Appropriate software can also generate samples with the PSG, SCC and MSX-MUSIC soundchips, or even the keyclick