Cualidades del sonido e instrumentos

https://www.dropbox.com/s/tr8csuu2s4880c5/CUALIDADES%20DEL%20SONIDO%2C%20LOS%20INSTRUMENTOS%20MUSICALES%2C%20LA%20FORMA%20MUSICAL%20A%20M%C3%BAsica%20Proyecto%20Clave%20de%20McGraw-Hill%20pdf.pdf?dl=0