Music:  Webster’s 1828 dictionary say this.  The art of combining sounds in a manner to please the ear...Melody or harmony; any succession of sounds so modulated as to please the ear, or any combination of simultaneous sounds in accordance or harmony; vocal or instrumental.  

Indelibly:  Webster’s: In a manner not to be blotted out or effaced; too deeply imprinted to be effaced, or to vanish..