During 1997, Séptima Práctica performed in Recoleta Cultural Centre- Buenos Aires, its own cycle "Viejo Siglo XX (Old Xxth Century)" They played XXth century works from new and consecrated composers from all over the world, in Séptima Práctica's particular aesthetic.

to give to a non-elitist audience a bigger visual display. The aim of attracting a non-specialised audience, ready to listen to a different kind of music, outdid all expectations. Séptima Práctica performed all concerts with a full attendance.

The cycle included "classic" composers like Takemitsu, Boulez, Ives, Nono, Kagel, etc., and young argentine composers. Some works have been played for the first time in Buenos Aires, some others for the first time in the world.

Séptima Práctica performed works which included all sorts of musical formations and genders: vocal and instrumental ensembles, band, solo, electronic music, opera and ballet.

During the same year, hired by the Buenos Aires Municipal Goverment, Septima Practica performed Aleatorian Music in subways, playing in plataforms and even in trains.

During 1998, persevering in its own aesthetic style, Septima Practica performed in Encuentros Internacional Festival, including for the first time works from foreigners composers unknown by the argentine audience, mixing them with works from consecrated composers.

During the same year, Septima Practica produced the musical- theatral play "El fin de la música (the end/aim of music)", that was successfuly presented in the San Martín Theatre Contemporary Music Cycle, the most important cycle in Buenos Aires. That play included works from Septima Practica and from the greats Schnittke and Varèse. "El fin de la música" is edited in Cd and Video