Call him Mr. Siple, Randy, Dr. Jass or the Rooster, but don’t call Randolph Siple an ordinary jazz musician.

“No, I play trad jass!” says Siple, the president of the West Coast Traditional Jass Club. And, no, that’s not a misspelling. Jass, says Siple, is the original slang term used to describe the Ragtime and Dixieland bands that came up from New Orleans to Chicago in the early 1900s.

Siple’s love of the music began when he first started swing dancing, which is how he could meet girls back in the day. He claims he was pretty good. “I straightened more curls than you could imagine,” he says.

But Siple didn’t even learn to play an instrument until he was in his 40s. “I was a late bloomer in music,” he says. “I was so bad no one would let me play with them.” So he took lessons, practiced and studied until he was good enough to form his own band in the early ’80s.

Siple’s band, the Untouchables, is a seven-piece ensemble that gets together each month to play a traditional set of West Coast Jass, followed by an open jam session at his organic winery near Carpinteria. Siple is usually on trombone, but he can play at least 13 different instruments.

When Siple is not wearing his hat as “Dr. Jass,” or tending to his organic winery, his day job takes him around the world as an organic certifier, which then affords him time after-hours to ensure the music he loves is not lost. The mission of his not-for-profit club is to perpetuate traditional jass and to keep the music alive through youth sponsorships to state jazz camps. He tells kids (and anyone thinking of picking up an instrument), “If you learn to play, you will find a joy in life that cannot be duplicated.”

Another hat Siple wears is that of the Rooster, who crows every Friday on KCSB after Dr. Jass’ music program. “I’m kind of a strange conservative,” explains the former prosecutor, whose views on sex and drugs put him out of step with his right-leaning peers. “If we made it all legal, all the problems would stop.”

Siple and his band play for the public and host a barbecue the first Sunday of every month from 1 to 5 p.m. at Piper Winery at 6500 Casitas Pass Road in Ventura. The next performance is May 6 and is preceded at 11 a.m. by a special “jazz funeral” to honor former band member George Peploe, who recently died.

For information and directions, call: 805-684-3929, 684-6494, or visit www.westcoasttradjass.com. The club will provide the barbecue pits, beans, salad, bread and “libations.” Guests are invited to bring their own protein and a donation of “whatever you can afford.” And jammers are always welcome.