PET music (Was: hmm, don't remember what the thread was originally :)

At 03:03 PM 1/4/02 -0800, Ethan Dicks wrote: Nitpick alert -- Hmm, for your D/A converter to be monotonic, you biggest resistor needs to be accurate to 1 part in 512*, or 0.20% tolerance, then the next one has to be good to 1/256, the next good to 1/128, etc, otherwise the smallest one isn't really doing much. In reality, for this and other reasons, I'd expect you to only really get 6b or so of accuracy. It still beats silence, though. *yes, 512, not 256, because you don't want to blow your entire error budget on the first bit; so let the biggest one use up half the error margin, then the next half of that, etc, such that the sum of each max error is equal to your total error budget. ----- Jim Battle == frustum(a)pacbell.net