"Cogito, ergo sum" Solo Bajo Presión(a kind of only under pressure meaning and a bass solo concept at the same time by connotation of the words in spanish) it's a project of contemporary music with a personal proposal that includes from classic music, jazz, blues, rock, latin and others until the original compositions in diverse styles with the low execution of electrical like its main instrument and with the participation of different musicians and musical instruments; this project is developed and exposed by Neftalí Lopez, bassist and musician of profession.