Rhye' clearly plays with notions of sexual identity, and it has made a concerted effort to keep its own identity mysterious. Its love songs are gender-neutral, the members have declined to appear in their own videos, and you'd be hard-pressed to find a photo of the duo that doesn't cast them in shadows.

Adele Adkins' retro-soul debut, '19', was striking less for her songs than for that voice: a voluptuous, slightly parched alto that swooped and fluttered like a Dusty Springfield student trying to upstage her teacher, or at least update the rules.

What's the difference between male and female passion? If love is a drug, what are its side effects? Rhye makes chill-out music, but it never quite lets your mind switch off.

Comeback records always worry me, especially when they're made by one of my heroes, and I'd heard stories about Gil Scott-Heron recently, about drug arrests and prison terms and other troubles. I wasn't prepared for the ravaged shakiness of his voice on this record or the raw spoken word pieces or the dark electronic backgrounds.