What plays .mpc files?
 

I have a few audio files that have .mpc extensions, what program do I use to play them, or where can I find a codec for Windows Media Player to play it?

You could always try Wikipedia.

There's a Direct Show filter (for WMP) and a Winamp plugin on the official site (LINK).

By the way, I don't mean to nag, but there's been an awful lot of threads here recently which were arguably more suited for the Help forum.

Don't forget that .mpc is supported right out of the box with Foobar2000.