The Visual Representation of Timbre

Abstract

This text deals with the difficult task of notating timbre by addressing how it can be classified, synthesised, recognised and related to visual correspondences, and then looking at the relevance of these topics for notational purposes. Timbre is understood as dependent on both spectral and time-dependent features that can be notated in ways that make sense in relation to both perception and acoustics. This is achieved by taking the starting point in Lasse Thoresen’s spectromorphological analysis. Symbols originally developed for perception-based analysis are adapted for use over a hybrid spectrum-staff system to indicate the spectral qualities of timbre. To test the system, it was used to transcribe excerpts of three classic electroacoustic music works. In addition to the benefit of being able to compare the three excerpts transcribed with the same system, there is the advantage that the visual representation is based on spectral measurable qualities in the music. The notation system’s intuitiveness was also explored in listening tests, showing that it was possible to understand spectral notation symbols placed over a staff system, particularly for examples with two sound objects instead of one.