> If they want to keep the signal pure analog, that is enough of a reason.
Why would they want that? It's possible to perfectly reconstruct the original signal. The sampling theorem states that analog and digital audio are equivalent given a high enough sampling rate.
> If a function x(t) contains no frequencies higher than B hertz, then it can be completely determined from its ordinates at a sequence of points spaced less than 1/2B seconds apart.
I don't see the point of analog signals anywhere in the pipeline other than in a DAC whose output drives the actual speakers.
There's no crime in simplifying the signal chain to reduce complexity. Theorems are great, but implementations are what matter and usually where things fall apart.
Why would they want that? It's possible to perfectly reconstruct the original signal. The sampling theorem states that analog and digital audio are equivalent given a high enough sampling rate.
> If a function x(t) contains no frequencies higher than B hertz, then it can be completely determined from its ordinates at a sequence of points spaced less than 1/2B seconds apart.
I don't see the point of analog signals anywhere in the pipeline other than in a DAC whose output drives the actual speakers.