I need to route sound from a personal computer to one of a horde of monitors. Only one monitor will be active at any one time, but I need to be able to switch between monitors rapidly (<50ms) controlled by the computer.
For n <= 2 monitors, the solution is simple. The computer can output a mono signal on channel 1 or 2, amplified through a standard stereo amp. For n <= 5 speakers, likewise, with an appropriate sound card and 5.1ch amp.
But what if I need to drive one of 10 monitors, or more? Of course, I could use, say, two M-Audio Delta 1010LT PCI cards and two off-the-shelf 5.1ch amps. But that seems wasteful, and impossible for n > 24.
In particular, I was wondering: does there exist a device which can rapidly route a single amplified output to one of n different monitors -- based on an external control signal?