House of Drumming.com

http://www.slate.com/articles/arts/culturebox/2014/02/the_time_signature_of_the_terminator_score_is_a_mystery_for_the_ages.html

What Is the Time Signature of the Ominous Electronic Score of The Terminator?

At first I heard it in 7 but I really think it is in 13.

7/8 followed by 3/4 - repeat ad nauseum....

I think it's in 13...
I hear it as 4 + 4 + 5...

A big ciao

It's pretty commonly accepted that it's in 13. You can easily prove it's odd by tapping singles over the top of it - your lead hand changes each time it turns around.

13/16! 1231231231234

Yeah 13/16.
3 - 3 - 3 - 4.

Interesting that Fiedel himself didn't know and the loop came out that way by accident. Imagine getting the call from Mancini asking for the lead sheet and not having it! Doh!