Abstract
Timbre is a complex auditory attribute that is extracted from a fused auditory event. Its perceptual representation has been explored as a multidimensional attribute whose different dimensions can be related to abstract spectral, temporal, and spectrotemporal properties of the audio signal, although previous knowledge of the sound source itself also plays a role. Perceptual dimensions can also be related to acoustic properties that directly carry information about the mechanical processes of a sound source, including its geometry (size, shape), its material composition, and the way it is set into vibration. Another conception of timbre is as a spectromorphology encompassing time-varying frequency and amplitude behaviors, as well as spectral and temporal modulations. In all musical sound sources, timbre covaries with fundamental frequency (pitch) and playing effort (loudness, dynamic level) and displays strong interactions with these parameters.
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