Sat Jan 1 15:07:48 EST 2011
Minimal digital processing setup
What does a digital EQ cost in components? The processing itself is
probably cheap, but the anti-aliasing and reconstruction doesn't seem
to be. For building circuits with multiple A <-> D conversions a
better approach is necessary.
This probably requires programmable logic. It is possible to do
fairly decent sigma/delta SD and class D D/A on an FPGA with very
simple external circuits. For uC circuits I'm afraid that there isn't
enough serial speed to pull this off in an efficient way
(i.e. multiple channels).