Born in Cádiz in 1959, autodidactic education, begins his musical career at the age of 14 as electric guitar player with bands and orchestras of his home town. Principally influenced by Jaco Pastorious he decides to change his instrument and to switch over to the electric bass. He assists various jazz courses held by the music workshop "Taller de Músicos de Barcelona" in Cádiz, Sevilla and Madrid and gives classes during the workshop "Taller de Músicos de Madrid" along with the US guitar player Sean Levitt and the saxophonist Antonio Mesa from Huelva. He also collaborates as recording musician at numerous performances. During the semesters 95/96 and 96/97 he gives classes at an adult education centre in Cádiz. He has worked with the following musicians: Chano Domínguez, Tito Alcedo, Michel Camilo, Antonio Mesa, Guillermo Mcgill, Tino di Geraldo, Marc Miralta, Albert Bover, Rubén Dantas, Antonio Serrano, Nirankar Singh, Walter Fraza, Jesús Lavilla, Manuel Machado, Ramón González, Antonio Toledo, Eva Durán, Chonchi Heredia, Moraito Chico, Blas Córdoba "Quejío", Israel Suarez "Piraña",Raimundo Amador & Kilo Veneno, Tomas Moreno "Tomasito", Chiquetete, Juanito Villar and others.

In November 2002 Alfonso Gamaza "Moderno" releases his first album titled "Cambalache Jazz Club" (Modern and Co.) with the independent production company "Surfonía" from Cádiz - a work based on rhythms of his home country (Alegrías, Bulerías,Tanguillos, Seguirillas etc) with a very particular cross over to jazz in which musicians such as Chano Domínguez, Tito Alcedo, Javier Ruibal, Jesús Lavilla, Antonio Serrano, Manuel Machado, Ramón González, Diego Magallanes, Pedro Cortejosa, Juan Gómez Galiardo, Cecilio J. Cirre, Jose Luis Bastos "Selu", Lolo "Pájaro" as well as Antonio Alemania and Palomar (singing) collaborated.

On November 7, 2002 he successfully debutes during the VIII. International Jazz Festival in Ceuta as
Alfonso Gamaza Septeto, highly appreciated by the audience as well as the media.