Drummer Mickey Hart's search for fascinating rhythms never stops.
During his stints with the Grateful Dead — from 1967 to 1971, and 1974 to 1995 — he and fellow Dead drummer Bill Kreutzmann got tagged with the nickname "rhythm devils."
In 1991, Hart won a Grammy Award for best world-music album with "Planet Drum," which also hit No. 1 on the Billboard World Music Chart and stayed there for 26 weeks.
Since then, working with his own Mickey Hart Band and scientific consultants, he has explored the rhythms of the universe, based on lightwaves from radio telescopes, translated by computer into sound waves.
On his new album, "Superorganism," wearing a cap outfitted with sensors, he's translating the rhythms of his own brain waves into music. But that doesn't mean the music is pure<CW-34>ly cerebral.
"My whole life is about rhythm, and the brain is rhythm central," said Hart, who lives outside Sebastopol. "It's music to dance to. It'll take you there."
With his 70th birthday coming up Sept. 11, he's launching his album release tour with a show Thursday at Healdsburg's Raven Theater.
"We want to celebrate my 70 years, but we don't want to get too crazy over this," Hart said with a laugh. "It's only 70. It's not like it's 90."
The tour will take him and his band all over the country, with the final concert scheduled for Sept. 26 in Bethlehem, Pa.
"There will be nights, perhaps not every night, where I'll put on the cap and you'll be able to see my brain waves in real time on the screen," Hart said.