During his Sonic Art courses at the Saint Louis College of Music in Rome (2007-2009), under the guidance of Luca Spagnoletti, Leonardo developed a virtual instrument called Chord Box, built using Native Instruments Reaktor.

Motivated by the pursuit of a “pure sound,” this instrument bypasses equal temperament, instead generating sine waves with frequencies calculated according to exact harmonic ratios (pure harmonics). This approach allowed him to create hollow, pad-like textures as free from beating as possible, as well as simplified and clean percussive sounds.

The E-Jazz project focused on combining pre-programmed sequences created with this instrument and live piano performances, representing Leonardo’s first true approach to experimental music.

Later, with the help of Eduard Resina Bertran, head of the Creation and Music Theory Department of the Escola Superior de Música de Catalunya (ESMUC), Leonardo developed a real-time playable version using Max MSP. This version was later used in several other projects, including Art.eria, Per Aria, and Leomode.