Two violoncellos piccoli, one with four strings, the other with five, making a total of nine strings: it is as if a new instrument were born, an organ with strings instead of pipes, to perform virtuoso polyphonic masterpieces with a larger, enriched sound palette. Taking Gustav Leonhardt's keyboard transcriptions of the Suites, Sonatas and Partitas as his point of departure, Mario Brunello adds a new sonic dimension to three of Bach's solo pieces for unaccompanied violin and cello, making the polyphony previously confined to only four strings audible. He is partnered by his longstanding friend the specialist Mauro Valli, who has already appeared on Arcana with his personal reinterpretation of the Cello Suites (Bach in Bologna A459, 2019).