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Convention Paper

Perceptually-Motivated Audio Morphing: Warmth

Authors: Brookes, Tim; Williams, Duncan

AES Convention 128 · Paper 8019 · May 2010

Abstract

A system for morphing the warmth of a sound independently from its other timbral attributes was coded, building on previous work morphing brightness only (1), and morphing brightness and softness (2). The new warmth-softness-brightness morpher was perceptually validated using a series of listening tests. A Multidimensional Scaling analysis of listener responses to paired-comparisons showed perceptually orthogonal movement in two dimensions within a warmth-morphed and everything-else-morphed stimulus set. A verbal elicitation experiment showed that listeners’ descriptive labeling of these dimensions was as intended. A further ‘quality control’ experiment provided evidence that no ‘hidden’ timbral attributes were altered in parallel with the intended ones. A complete timbre morpher can now be considered for further work, and evaluated using the tri-stage procedure documented here.

Details

Published in
AES Convention 128
AES Convention
128
Paper number
8019
Publication date
May 6, 2010
Session subject
Music Analysis and Processing
Affiliation
Institute of Sound Recording, University of Surrey, Guildford, Surrey, UK (See document for exact affiliation information.)
Type
Convention Paper