Per una possibile storia della musica. 7

https://www.youtube.com/watch?v=u0qkP1kvEdQ&feature=share&fbclid=IwAR1Y8YrA_FI8_nv0kDgDVkfWKISvvNCzMqy5y67CLFKBLCFyiG8YY5g3rBk