As much as I love the analog sound of early electric guitars and keyboards, I'm okay with simulations. After all, at the end of the day any possible sound is the output of a one dimensional function that takes the time and returns a value. You call this function 40k times a second (at most), wiggle a voltage in proportion to the return value, feed the output stream into a digital-to analog-converter of some sort, and…
The first part of this sentence, the wiggle, is already a DAC.