Le Slie’s translates the rotating principle of the 1940s Leslie loudspeaker into an acoustic instrument of percussion. Drawing on the Doppler effect as both physical and musical process, the work reconfigures a technology of modulation into a system for sculpting timbre and articulation.

​

The work can take the form of either an installation or a concert, where six individually addressable voices can be controlled from a digital audio workstation. High performance mechanics allow velocity sensitive striking up to 200 hertz and rotational speeds exceeding 1000 revolutions per minute. At these rates, modulation enters the audible spectrum, generating sidebands, inharmonic partials and complex beating patterns. Variation in striking density and rotational velocity shapes envelope and colour, extending from pointillistic attack to sustained tremolo, from dry staccato to slow crescendi and glissandi across the overtone field.

​

Fabrizio Di Salvo: Concept, Instrument, Music

Roberto Maqueda: Performance, Music

Alexander Buers: Engineering

​

displayed at Festival Klang Moor Schopfe (CH) | Synthesizer of Arts Festival (POL) | Keroxen Festival (ESP) | Instituto Svizzero Roma (IT) | Interfinity Festival (CH)