Marcos Valle straddled North and South America for over twenty years taking part in some of the most important recordings by artists including Sarah Vaughan, Frank Sinatra, Tom Jobim, Sergio Mendes, Leon Ware, Chicago and Airto Moreira. In 1963 at the tender age of twenty Marcos managed to record over a dozen albums in Brazil debuting with Samba Demais. Overnight Marcos was a success. His biggest success in Brazil was to come with the album Viola Enluarada which cemented his position as a major recording artist in Brazil and one of the most important innovators of the Bossa Nova genre.

After touring the States with Sergio Mendes band there was a growing interest in his songs from several American artists. He received many invitations to record in the States and to appear on national television. The boy from Ipanema was suddenly the star of the Andy Williams Show coast to coast across the States. Probably his biggest triumph was for entering the Guinness Book of Records as the only artist to have a track in the Billboard Top Forty with three different versions of the same song at the same time including a version by Frank Sinatra. The song "Samba de Verao" became a bossa nova standard.

Determined to keep in touch with his roots Marcos returned to Brazil in 1968 to work with Milton Nascimento on his own television show which helped to launch Milton’s career. He also continued to record the seminal series of albums on EMI always adapting his songwriting and production style which twenty years on were rediscovered on dance floors of Europe.

In the late 70s Marcos continued to work in the US and started long-standing partnerships with Leon Ware and Chicago and performed with major artists like Sarah Vaughan. The partnership with Leon Ware was very profitable and they worked closely together on Leon’s album Rocking You Eternally and his self titled LP.