[sdiy] FPGA digital audio

[Grant Richter]

Are there any other designs for digital oscillators besides the classic
indexed accumulator?

I was thinking a digital implementation of a counter wavetable driver. It
seems like with 1 nanosecond clock speeds, a high resolution variable
divider driving a counter would allow sub-hertz resolution.

A high resolution successive approximation A/D could also be realized in the
FPGA. From the outside it would look like an analog oscillator, the the
wavetable could be extremely wide range and stable.