We isolated five short excerpts from our recordings, corresponding to musical phrases of five to eight seconds, both at 44.1 kHz and 88.2 kHz. No sound
processing was applied, except for a fade-in and a fade-out in Pyramix 6 software (Merging Technologies, Switzerland). We made sure that the selected files at 44.1 kHz and 88.2 kHz had the exact same fades (in and out) and length. Then, we downsampled the 88.2 kHz files to 44.1 kHz. We chose Pyramix to down-sample the files, this software being commonly used by sound engineers who record acoustic music in high-resolution formats.