Since its founding in 1992, San Francisco’s Del Sol String Quartet has been among the most tireless and innovative champions of contemporary music — expanding the repertoire with new commissions and undertaking to reclaim forgotten stylistic strains of the recent past.
Now it’s time to take a victory lap.
This weekend brings the Whole Sol Festival, a three-concert celebration of the group’s 25th anniversary. On Thursday, Nov. 16, the concert is devoted to music of Terry Riley, followed on subsequent nights by spotlights on Gyan Riley and Gabriela Lena Frank.
— Joshua Kosman
Del Sol String Quartet: 8 p.m. Thursday-Saturday, Nov. 16-18. $50-$75. Taube Atrium Theater, 401 Van Ness Ave., S.F. (415) 374-0074. www.delsolquartet.com