Hundreds of people gathered at Dolores Park on Saturday night for the annual Unsilent Night, a group sound performance held every year since 1992. Composer Phil Kline, who organizes the event, wasn’t present but followers showed up right on time.

Participants brought boomboxes and iPods, and picked up free tapes and CDs handed out at the park before the march. At the count of three, they all pressed play and began walking together through the alleys and streets of the Mission.

As the group walked, residents stopped with a surprised look on their faces. For some participants, like Kristen Isaacs, a 28-year old who lives in the Marina, this was a first. We followed Isaacs as she experienced what may become an annual holiday tradition.