RIGHT SAID FREDO Fredo Viola, an ensemble that blends bluegrass, electronic, folk,and classical influences, performs at a downtown gallery. Tonight, 8-9 p.m., Dactyl Foundation, 64 Grand St., between West Broadway and Wooster Street, 212-219-2344, $10 suggested donation.

KING OF THE KEYS Pianist Stephen Kovacevich performs a program of works by Berg, Beethoven, and Schubert as part of the Metropolitan Museum of Art’s Piano Forte performance series. Tonight, 8 p.m., Metropolitan Museum of Art, 1000 Fifth Ave. at 82nd Street, 212-570-3949, $40.

BACH IS BACK Organist David Shuler performs a recital titled “J.S. Bach and the French Connection.” Tonight, 8 p.m., Church of Saint Luke in the Fields, 487 Hudson St. at Grove Street, 212-414-9419, $20 general, $15 students and senior citizens.

FOR THE FLUTE Ralph Samuelson, Elizabeth Brown, Shoji Mizumoto, and Ned Rothenberg perform a program of music for the shakuhachi, a traditional Japanese bamboo flute. The concert features traditional and new compositions for one to four players positioned around the room. Tomorrow, 8 p.m., Location One, 20-26 Greene St., between Grand and Canal streets, 212-334-3347, $12 general, members free.

MUSIC FROM AFRICA Focus on Africa, a three-day music festival, celebrates historical and contemporary African music. South African composer Bongani Ndodana conducts his own works, performed by soprano Dawn Padmore and the African Exchanges Ensemble (tomorrow, 7 p.m. discussion, 8 p.m. concert, $20). The concert African Exchanges showcases works by nine composers and looks at the musical exchanges among Africa, Europe, and America (Saturday, 8 p.m., $20). The festival closes with a symposium featuring composers, performers, and scholars (Monday, 8 p.m., $15). Festival: Miller Theatre, 2960 Broadway at 116th Street, 212-854-7799. For a full schedule, to go www.millertheatre.com.

RIVERSIDE PERFORMANCE Music director George Rothman will conduct the Riverside Symphony in the second subscription program of the orchestra’s 25th-anniversary season. The concert features a rarely heard piece from the Baroque master Jean-Philippe Rameau and a contemporary work by Marius Constant, who died in 2004. French violinist Olivier Charlier will be featured. Saturday, 7:30 p.m., Lincoln Center, Alice Tully Hall, West 65th Street near Columbus Avenue, 212-721-6500 $25 and $45.

NEW CHORAL TUNES Harold Rosenbaum conducts the New York Virtuoso Singers in a concert featuring recent choral music by John Adams, David Lang, Julia Wolfe, Michael Gordon, Jeffrey Schanzer, and Steve Martland. Saturday, 8 p.m., Merkin Concert Hall at Kaufman Center, Goodman House, 129 W. 67th St. at Broadway, 212-501-3303, $20.

PHILHARMONIC PROGRAM The Berliner Philharmoniker, conducted by Sir Simon Rattle, performs a program comprising Haydn’s Symphony No. 86 in D major; Schonberg’s Variations for Orchestra, Op. 31, and Strauss “Ein Heldenleben.” Wednesday, 8 p.m., Carnegie Hall, Isaac Stern Auditorium, 881 Seventh Ave. at 57th Street, 212-247-7800, $58-$195.

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