Pendant ses cours d'art sonore au Saint Louis College of Music à Rome (2007-2009), sous la direction de Luca Spagnoletti, Leonardo a développé un instrument virtuel appelé Boîte à accords, 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 (harmoniques pures). Cette approche lui a permis de créer des textures creuses, semblables à des pads, aussi exemptes que possible de battements, ainsi que des sons percussifs simplifiés et propres.

Le 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 Ariaet Leomode.