I was just watching Nestor Emiro Gomez’s excellent interview of Michi Sarmiento for Herencia Latina, and realized that on the text for Aqui Los Bravos! The Best Of Michi Sarmiento y su Combo Bravo 1966-67 on Soundway (2010) I said that:
“By 1967 he had formed his Combo Bravo (the band consisted of two trumpets, Michi on tenor sax and clarinet, guitar and piano, electric bass, tumbadora, timbales and a young Joe Arroyo on vocals)”
Joe Arroyo never sang with Michi’s Combo – he sang with Michi’s Combo once they left Michi (in 1972, I believe) and became La Protesta, led by bassist Leandro Boiga.
Per Gomez’s interview, the members of Michi’s Combo included: Boiga on Bass, Rafael Benitez on Timbales, Guillermo Martinez, Faustino Martes, Angel Gonzalves and Sofronin Martinez (of Los Galleros) on Electric Guitar, Mauricio Lombana and Antonio Morales on Trumpet, Michi on Tenor Sax and Clarinet, Lucho Pertana (?) on Tunbadora. Singers included Michi, Felipe Sambergman Jr., Joe Hurtado and Victor Melendez (later of Latin Brothers). The pianist was the great Juancho Vargas (!), born in Barranquilla but living at the time in Medellin.
You can see the entire interview here: