Μιλώντας για ήχο, ένα μικρό (για λόγους κόπυράιτ) απόσπασμα από ένα εξαιρετικά ενδιαφέρον άρθρο:
"In 1974, Fabien Maman was working as a professional jazz musician. He noticed that certain musical keys had an energizing effect on both the musicians and the audience.
Fabien worked with the...