Windows Tool for Harmonic Analysis & Synthesis

ESynth is a free program designed to explain the harmonic analysis and synthesis of signals. With ESynth you can create signals by adding together individual sinusoidal waveforms (sinewaves) and study the resulting waveform and spectrum. You can also perform an analysis of an input waveform, to see how a given sound can be represented in terms of a sum of sinewaves.

Read the ESYNTH help file on-line.

Download and Installation

SFS/ESYNTH is only available by anonymous FTP from:

Download the file called esynth1dd.exe into a temporary directory. Then find and run the file to unpack and install.

Want to learn more?

If you find the study of speech interesting, why not visit the Internet Institute of Speech and Hearing at www.speechandhearing.net ? There you will find tutorials, laboratory experiments, reference material, and details of e-mail lists and discussion groups.


Please send suggestions for improvements and reports of program faults to SFS@phon.ucl.ac.uk.

Please note that we are unable to provide help with the use of this program.


ESYNTH is not public domain software, its intellectual property is owned by Mark Huckvale, University College London. However ESYNTH may be used and copied without charge as long as the program and help file remain unmodified and continue to carry this copyright notice. Please contact the author for other licensing arrangements. ESYNTH carries no warranty of any kind, you use it at your own risk.

Some other pages on our site you may enjoy:

Web Tutorial on Loudness

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EFxHist - Fundamental Frequency Histograms

EFxHist is a program to analyse joint speech and laryngograph recordings. EFxHist locates each pitch period in the laryngograph waveform and produces statistical analyses including distributions of fundamental frequency, closed-quotient, jitter and shimmer. More information.