Foster The People have brought out a fourth album, and the title pretty much describes what the sound: “Paradise State of Mind.” There’s a relaxed bass droning in the background while frontman Mark Foster sings lines like “You know you know we’ll be alright / Take me closer to the good times.” While the music on “Paradise State of Mind” is danceable and radio-friendly, it also has plenty of experimentation with elements of disco and psychedelic music. Synthesizers in space Take “Lost in Space.” A Daft Punk-like synth is mixed with indie choirs and a danceable clap beat. It’s interspersed with …