The immodest title of this one carries a double connotation; it was probably the first album of jazz in which the leader recorded entirely on bass clarinet and, less significantly, the first Riverside album recorded on the West Coast. The first achievement – which Mann and producer Orrin Keepnews thought of three years before Eric Dolphy broke out his bass clarinet on records – ought to be more widely known, but the usual prejudices among critics regarding Mann's subsequent popularity among record buyers have decreed otherwise.