No DAC?

Unless I’m missing something I can see no DAC.
How is the digital signal passed to the analog board ?

PWM

Welcome to the world of grit :slight_smile:

Historical note: the PPG Wave Series used much more electronics to produce about the same amount of grit - the MI approach to produce noise/grit/garbage in the signal is clearly an indicator of the technical advance and MI beeing on the leading Edge :wink: