As sonically rich as Gert Jan-Bijl and Paulo Delgado’s loungy productions are on Perspectives, it’s the numerous silky-voiced guest vocalists that provide much of the soul. The melancholy downtempo melodies on “Imaginary Friend,” for example, are perfectly complimented by the sorrowful yet strong resonance of Dee Ferguson. And on the broken beat-ish “What Is It?,” Portuguese-born Londoner Guida de Palma’s bilingual vocals simply float atop the jumpy rhythm. More than just instrumentalists, the masterminds behind Gerd have an ear for complete compositions, regardless of the style at hand.