timbral melodie

Create a temporal evolution not by varying the pitch of the sound, as in a traditional melody, but by changing its “color” by filter actions, either by attenuating the high (low-pass) or low (pass-through) values. high, either by highlighting a precise harmonic frequency (upper band of the Fonofone filter).

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The melody of timbre (Klangfarbenmelodie) is a notion formalized and exploited particularly by the Viennese composers Anton Webern and Arnold Shönberg. See: https://en.wikipedia.org/wiki/Klangfarbenmelodie