One perfect loop: Kebu - Interlude4, The Lunar Effect (live @ Dux)
polyphonic overtone singing - explained visually
The Mellotron: A Keyboard with the Power of an Orchestra (1965) | British Pathé
What Makes John Bonham Such a Good Drummer?
'recurrence'... polychromatic composition by Dolores Catherino - Microzone u648
polyphonic overtone singing - explained visually