A key moment in Seattle hip-hop happened this summer in the shadow of Capitol Hill Block Party—at the rogue Squadfest event happening next door at Vermillion: Kung Foo Grip’s Greg Cypher mounted the hood of a police car and jumped and rapped some much-needed anthems to an adoring crowd.

The next day, KFG themselves host a sellout rooftop event at 95 Slide, so packed beyond capacity that most of us stood down below on the street, listening the way Londoners did on that fateful day when The Beatles played building-top.

Concrete Waves lives up to the promise of this spectacular summer. Production from SCLY (aka Def Dee) feels like cruising down Broadway in a bouncing lowrider. The beat on the first track, “Low End/96 Shit,” is so undeniably, addictively fresh that you’ll find yourself replaying this one song over and over again before devouring the rest. Also of note is an appearance by the rapper Mos Def. He has a verse on the song “How It Sound.”