These audios were used for an experiment on musical meter and perception of time. The audios present the same melody, sung by a female professional singer, accompanied by 4 different piano accompaniments: at eighth-notes, at quarter-notes, at half-notes and at an irregular rhythm. Harmonic progression, melody of the voice and tempo were preserved across the 4 versions. Special thanks to the musicians: Luis Carlos Pinto de Castro and Ana Luisa Gomes. Melody and accompaniment were composed by Ligia Borges Silva, who also conducted this research. More info at www.ligiaborgessilva.wordpress.com