BigWill,
Precise signal length is irrelevent at these frequencies. You're not capable of hearing the difference.
It is a concern in trace lengths on circuit boards operating at very high speeds, but we're talking more like a factor of a million or so over the audio range. In that case, the trace routes are either run back and forth to result in an identical total length or programmable delay ICs are utilized like our MC100EP195. To give you an idea, that device has a delay range from 2.2ns to 12.2ns in 10ps steps. That's way outside what any home theater should be concerned with.
