I imagine, say, if I have some speakers that need power for something(say
>some lights or maybe an active filter) but instead of running an extra wire
>for power(and I'll probably need one for ground) why I couldn't just run the
>power over the same analog audio lines.
Look here: [
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](of course this is for analog stuff but I figure the same could be
>applied to digital)
A variation of the basic idea is here: [
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]