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Estimating parameters from audio for an EG+LFO model of pitch envelopes

Welburn, SJ and Plumbley, MD (2009) Estimating parameters from audio for an EG+LFO model of pitch envelopes

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Abstract

Envelope generator (EG) and Low Frequency Oscillator (LFO) parameters give a compact representation of audio pitch envelopes. By estimating these parameters from audio per-note, they could be used as part of an audio coding scheme. Recordings of various instruments and articulations were examined, and pitch envelopes found. Using an evolutionary algorithm, EG and LFO parameters for the envelopes were estimated. The resulting estimated envelopes are compared to both the original envelope, and to a fixed-pitch estimate. Envelopes estimated using EG+LFO can closely represent the envelope from the original audio and provide a more accurate estimate than the mean pitch.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Authors :
NameEmailORCID
Welburn, SJUNSPECIFIEDUNSPECIFIED
Plumbley, MDm.plumbley@surrey.ac.ukUNSPECIFIED
Date : 1 December 2009
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:21
Last Modified : 17 May 2017 15:10
URI: http://epubs.surrey.ac.uk/id/eprint/838903

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