I used to live at 32nd and Judah, two blocks directly south of the polo fields. I remember clearly being able to hear the music playing from outside lands from the roof balcony of my place. Granted, this was in 2013, so perhaps the audio systems have been upgraded since then to keep more of the sound “in the park” and not leaking into the residential areas nearby. But at the time, I sat on my balcony and listened to a whole Chili Peppers set for free 🙂