Assuming your aircraft has an intercom, you can make a direct-connect
cable
using Gene Whitt's directions found he
http://tinyurl.com/36x3c

I've made one of these cables, and they work good. I don't mess with tapes,
though. I bought an Olympus DM-1 digital recorder.. With the included 64MB
Smart Media, it will record for 10 hours on best quality. Double that if
you get a 128MB card. (Which is the max you can use). It also plays back
MP3/WMA format music files too.

Here's a small .wav clip from one of my recordings:
http://tinyurl.com/2ycds

--
Ben
C-172 - N13258 @ 87Y