OT: Un-finalized Music CD/R Recovery

I have an audio CD/R recording of our church's service from last wee=

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that I can't playback on any of the several machines (audio players to CD=
=20
players in computers). I'm guessing the disk wasn't "finalized" (what doe=
s=20
that mean, anyway?).
     Visually, however, I can see that the disk has been recorded upon.
     Is there any way to recover the recording?
     I'd prefer Linux tools, of course, but won't rule out others.

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Ed Skinner, ed@flat5.net, http://www.flat5.net/