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Equalizer, audioplayer, GUI

version 1.0.0.0 (15.6 KB) by Maxim Vedenyov
Possible to change equalizer during playing

5.6K Downloads

Updated 23 Jan 2012

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http://simulations.narod.ru/
There are player with digital equalizer matlab. Each slider is second order linear filter, infinite impulse response (IIR) filter. Direct-form I used to combine all filters to one filter object. Signal processing toolbox and Data Acquisition Toolbox are used.

Sometimes playing stop if GUI activity is hight: when move slider too long by pressed up or down button.

All audio file is read to variable s before start play. It can read pcm wav files with wavread function. To read other types (mp3 wma ect) it is need to downlad mmread codes:
http://www.mathworks.com/matlabcentral/fileexchange/8028-mmread
and unzip all files to folder where the equalizer codes.

It is possible to change number of sliders, see n-variable in equalize.m Also need to change f Q filts_type

Formulas for a and b coeficients for peak, low-shelving, high-shelving filters was get here:

http://www.apogeemems.com/ddx/PDFs/AN-06.pdf

See how it works here:

http://www.youtube.com/watch?v=fUYmFjdrCQA

Run equalizer.m

Cite As

Maxim Vedenyov (2022). Equalizer, audioplayer, GUI (https://www.mathworks.com/matlabcentral/fileexchange/34739-equalizer-audioplayer-gui), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2010b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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