Steve Reich is a composer famous for his experimentation with musical looping and phasing. Check this out:
“Steve Reich is calling” Ringtone Phasing like Steve Reich with Apple’s Marimba Ringtone.
The above (by Seth Kranzler) is based on Steve Reich’s Piano Phase, a 1967 piece designed to be performed by two pianists playing the same piece of music at two slightly different speeds. Here’s classical percussionist David Cossin performing a version of the duet with piano and himself:
This will help you visualize what’s going on:
The enigmatic Canon 1 à 2 from J. S. Bach’s Musical Offering (1747), The manuscript depicts a single musical sequence that is to be played front to back and back to front.
By Tool, 1997. The song is mostly in 4/4 time with some sections of 7/8 in between. In the intro, Danny Carey plays 4 measures of 7/8 on his ride cymbal over the rest of the band playing in 4/4, and they all meet up on the downbeat of the 5th measure in 4/4. During the bridge there are 3 measures of 7/8 followed by one measure of 4/4. During a particular quad fill, the drums are in 3/8, the guitar plays one measure of 9/8 followed by one in 5/8 all while the bass keeps time in 7/8.