Durante i corsi di Sonic Art al Saint Louis College of Music di Roma (2007-2009), sotto la guida di Luca Spagnoletti, Leonardo ha sviluppato uno strumento virtuale denominato Scatola degli accordi, 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 (armoniche pure). Questo approccio gli ha permesso di creare texture vuote, simili a pad, il più possibile prive di battito, nonché suoni percussivi semplificati e puliti.

Il 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, e Leomode.