Allow me to get ridiculously cheesy on you: if an echo was something physical that could fit in your pocket and be left somewhere, then picked up and churned out into a song, that song would be Beach House’s newest release “Myth.” It’s a floating dreamscape, rolling against the tides of some subconscious feeling. I want to build a canoe inside this song. Corniness aside, it’s really beautiful. I’m hooked.