Perhaps Harold Budd
This album has an average beat per minute of 107 BPM (slowest/fastest tempos: 54/171 BPM).
See its BPM profile at the bottom of the page.
BPM Profile Perhaps
Album starts at 70BPM, ends at 69BPM (-1), with tempos within the -BPM range.
(Try refreshing the page if dots are missing)