11-07-11: Atmasphere
My guess though is that when we can do 64-bit DACs on a regular basis that digital will start demonstrating the promise that its been showing.
Thanks, Ralph. It seems to me, though, that it would be a pretty safe bet that that will never happen. In fact I suspect it is theoretically impossible, due to Johnson noise, shot noise, etc. Quantization of a 2 volt full-scale range into 64 bits would mean that the least significant bit corresponds to about 0.0000000000000000001 volts. (That's 18 zeros between the decimal point and the "1").
Intuitively it seems to me that although as you say the Nyquist theorem assumes unlimited resolution of the samples, 24 bits or so should be precise enough to be just as good for all practical purposes.
Best regards,
-- Al