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Appl. Sci. 2016, 6(4), 116; doi:10.3390/app6040116

Semantically Controlled Adaptive Equalisation in Reduced Dimensionality Parameter Space

Digital Media Technology Lab, Birmingham City University, Birmimgham B42 2SU, UK
This paper is an extended version of our paper published in the 18th International Conference on Digital Audio Effects, Trondheim, Norway, 30 November–3 December 2015.
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Academic Editor: Vesa Valimaki
Received: 24 February 2016 / Revised: 4 April 2016 / Accepted: 5 April 2016 / Published: 20 April 2016
(This article belongs to the Special Issue Audio Signal Processing)
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Abstract

Equalisation is one of the most commonly-used tools in sound production, allowing users to control the gains of different frequency components in an audio signal. In this paper we present a model for mapping a set of equalisation parameters to a reduced dimensionality space. The purpose of this approach is to allow a user to interact with the system in an intuitive way through both the reduction of the number of parameters and the elimination of technical knowledge required to creatively equalise the input audio. The proposed model represents 13 equaliser parameters on a two-dimensional plane, which is trained with data extracted from a semantic equalisation plug-in, using the timbral adjectives warm and bright. We also include a parameter weighting stage in order to scale the input parameters to spectral features of the audio signal, making the system adaptive. To maximise the efficacy of the model, we evaluate a variety of dimensionality reduction and regression techniques, assessing the performance of both parameter reconstruction and structural preservation in low-dimensional space. After selecting an appropriate model based on the evaluation criteria, we conclude by subjectively evaluating the system using listening tests. View Full-Text
Keywords: equalisation; adaptive audio effects; semantics; dimensionality reduction; intelligent music production equalisation; adaptive audio effects; semantics; dimensionality reduction; intelligent music production
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Stasis, S.; Stables, R.; Hockman, J. Semantically Controlled Adaptive Equalisation in Reduced Dimensionality Parameter Space. Appl. Sci. 2016, 6, 116.

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