VINTAGE VOLTAGE Antique radios and televisions, vintage musical instruments, records and video games and all manner of classic audio and musical gear will be for sale at the Vintage Voltage Expo, running from 10 a.m. to 3 p.m. Sunday at the Ramada Plaza, Interstate 25 and 120th Avenue, Northglenn. The day includes lectures, demonstrations, panel discussions and more. $5. 303-347-8252 or www.danacain.com.

FROM BACH TO HENDRIX Cellist Matt Haimovitz breaks the classical-music mold, preferring to take his 17th-century Italian cello into bars and coffeehouses instead of traditional concert halls. Playing everything from Bach to Jimi Hendrix, Haimovitz performs at 7:30 tonight at the Rock N’ Soul Cafe, 5290 Arapahoe Ave., Boulder. $10-$12. 303-443-5108.

SPLASH OF RIO It may be a long flight to Rio de Janeiro, but Boulder’s Sambadende is transporting passengers via music and dance at 9 p.m. for Saturday’s Noite Brasileira (Brazil night) at the Fox Theatre, 1135 13th St. Joining the band are fellow Brazilian music acts Ginga and Capoeria Luanda. $10-$12. 303-443-3399 or www.foxtheatre.com.