The music you’re hearing now is by a group named Heartwatch. You may have heard this San Francisco band when they were called The Tropics.
The musicians currently known as Heartwatch are performing Saturday (08.08). They're part of this year’s Outside Lands Music Festival in Golden Gate Park. Yes, it’s sold out -- but the sounds definitely spill beyond the confines of the fenced-off festival, so you might still be able to hear them.