At this point, Valle had grown tired of the strictures of living and working under Brazil's military dictatorship, then in its darkest and bleakest phase. He therefore decided to return to the U.S., where he spent the rest of the decade. Settling in Los Angeles, he entered into collaborations with artists as diverse as Sarah Vaughan, Chicago, and R&B singer and songwriter Leon Ware. Valle and Ware found themselves especially compatible, and wrote many songs together. Valle appeared on several of Ware's Elektra Records releases.