How often does this happen: You check out the lineup of the city’s free outdoor concerts — SummerStage, Prospect Park’s Celebrate Brooklyn, JellyNYC’s Pool Parties, the Seaport Music Fest, Siren — and don’t recognize half the bands’ names. So for our latest mix we asked Matt Tyson of the fantastic, and fabulously revamped music site EAR FARM (check out the new look!) to curate a mix of bands, obscure and familiar, playing all these music series. Download the free, 100 percent legal mix here, or listen now to our Endless Summer muxtape.–Brooklyn Based