Actually, rhythm is the key element in the structure of these songs: The beat varies from smart hip-hop to relaxed R&B, with touches of reggae, funk, and on some tracks even cool jazz. The album’s spirit, though, lies in the vocals and lyrics. Harmony sings in a strong, clear alto and raps with nervy intensity about issues ranging from God to Eurocentrism. Harmony was produced by one of rap’s most politically conscious stars, KRS-One of Boogie Down Productions (who also happens to be Harmony’s brother-in-law). It isn’t as accomplished a debut as Neneh Cherry’s was last year, but it rivals Cherry’s album in diversity — both musical and topical — and sheer attitude. B