This jam track is very reminiscent of Rory Gallagher's song "Calling Card".
It is in the key of G Minor and in the time signature of 12/8 and is based around two chords, a Gm7 and a Cm. So the G natural minor or minor pentatonic works well throughout the backing track. But it can add a nice flavour if you play in C Dorian over the C Minor chord.
The backing track, similarly to the song has various stops which last for one bar. These stops are every 11 bars. So if you count as you play you'll effectively be able to pre-empt these stops and work some cool licks into them.
To get this backing track follow this link:
http://dl.dropbox.com/u/15967191/calling%20card%20backing%20track.mp3
Enjoy!
