Hello, sorry to bother you.

I cannot find this song, but I swear there was an all-instrumental song by CCR that came out before 1975 or so. Not a fast song, it had a kinda repetitive riff, but I thought it was great ... yet never got the name (a friend played the album at his house). Heard it on the radio once or twice since then, but never back announced.

It might have been an intro track to some other song, but it was about 2 or 3 minutes long. It was not a 16 bar blues, it had a more emotive sound.

Any thoughts? I'm hoping a real CCR guru will know what I mean. Thanks!

T S in Phoenix