Robert Fripp isn't a household name, but he's had a music group and project for the last 50 years called King Crimson, and with numerous band members and collaborators he's created some of the most amazing and original sounds in popular music. Andy Summers, who is more of a household name, was the lead guitarist for the Police.
Although I recommend the entire album, please listen to just the first track so you can see what an incredible album this is. The first track is in 7/4 time.
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