sound-visualizer

OpenGL visualization and FFT spectrum filtering

Bars visualization animation

What is it?

This is an OpenGL visualizer for sound files.

It uses SFML library for window creating and sound playing.

It has 3 types of visualization:

• Wave data;
• Spectrum;
• Bars visualization.

Also you can apply FFT (Fast Fourier Transform) filter to sound and it will be shown on visualization.

And it's my first experience in C++.

For what?

For education purposes.

I made it for my DSP university course.

Any reference?

Of course.

https://www.youtube.com/watch?v=kf1m1KqmCJg - start point of all my work. Thanks Tyler Tesch for shaders example and openGL base.

http://www.librow.com/articles/article-10 - I used many libraries and FFT methods, but, for some reasons, choose this one. Thanks Sergey Chernenko for FFT code and great articles.

How to use it?

Just drag&drop your music files onto *.exe. You can use ogg, wav, flac, aiff, au and many more SFML supported audio formats (but not mp3).

Then, according to in-code documentation:

/**
 *  Main function
 *
 *  @Controls
 *  P - play/pause;
 *  M - switch visualization mode;
 *  R - reload the shader;
 *  T - change track;
 *  Q - increase bottom filter threshold;
 *  Z - decrease bottom filter threshold;
 *  W - increase upper filter threshold;
 *  X - decrease upper filter threshold;
 *  Escape - exit.
 * */

Whats now?

Be free to make forks and pull requests :)