Is Frank Ocean’s long-awaited follow-up to Channel Orange imminent? On Friday, he released his first single since that album, entitled “Memrise.†The sounds are languorous, atmospheric, and suffused with the kind of hazy romance he’s known for. “I memorized your body exposed/ I could fuck you all night long/ from a memory alone,†he sings. The track is just shy of two minutes long, so it’s likely just a morsel of things to come.