"No CPU involved" is not strictly true, as the CPU is doing the LFO. You can observe this by, for example, rapidly moving the data slider and noticing that the LFO slows down.
I considered doing a super-accurate "dirty" mode but ultimately decided against, as most of these changes would make it sound worse. One important subtlety is that after the DAC (which is just sample-and-hold) there's a Sallen-Key low-pass filter tuned at about 16kHZ, to round off the worst of the DAC artifacts. Many digital replicas (my own included) miss this, which gives a harsh brittleness to the sound.
I know dexed added multiple bit depths (this work was done after mine, and I haven't followed their fork carefully). I don't know about the other aspects of the signal chain though.
I get where you are coming from, though, and think it would be a good project for a super-dedicated contributor.
I considered doing a super-accurate "dirty" mode but ultimately decided against, as most of these changes would make it sound worse. One important subtlety is that after the DAC (which is just sample-and-hold) there's a Sallen-Key low-pass filter tuned at about 16kHZ, to round off the worst of the DAC artifacts. Many digital replicas (my own included) miss this, which gives a harsh brittleness to the sound.
I know dexed added multiple bit depths (this work was done after mine, and I haven't followed their fork carefully). I don't know about the other aspects of the signal chain though.
I get where you are coming from, though, and think it would be a good project for a super-dedicated contributor.