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Sound visualizer in C#

, 15 Aug 2007 GPL3
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Simple sound sampler with visualization
Screenshot - SoundViewer.jpg


This project demonstrates the use of the Fast Fourier Transform and Windows GDI to produce near real-time visualizations of the time and frequency domains of sound.


While looking for information on signal processing for a robotics project, it became apparent that examples written in C# were hard to find. This led me to create some of my own classes, which I have provided here for this demonstration.

Using the Code

Audio input for this demonstration is provided by the Wave classes developed by Ianier Munoz. Wave samples are further processed using the AudioFrame class.

class AudioFrame
    private Bitmap _canvasTimeDomain;
    private Bitmap _canvasFrequencyDomain;
    private double[] _waveLeft;
    private double[] _waveRight;
    private double[] _fftLeft;
    private double[] _fftRight;
    private SignalGenerator _signalGenerator;
    private bool _isTest = false;
    public AudioFrame(bool isTest)
        _isTest = isTest;

    /// <span class="code-SummaryComment"><summary>


This article, along with any associated source code and files, is licensed under The GNU General Public License (GPLv3)


About the Author

Jeff Morton
Systems / Hardware Administrator
United States United States
No Biography provided

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Comments and Discussions

GeneralRe: Shutdown addition Pin
Jeff Morton27-Nov-07 3:57
memberJeff Morton27-Nov-07 3:57 
GeneralRe: Shutdown addition Pin
firmwaredsp28-Nov-07 0:21
memberfirmwaredsp28-Nov-07 0:21 
QuestionHow it works?? Pin
Ibrahim Dwaikat28-Oct-07 10:22
memberIbrahim Dwaikat28-Oct-07 10:22 
AnswerRe: How it works?? Pin
j_morton28-Oct-07 10:29
memberj_morton28-Oct-07 10:29 
GeneralRe: How it works?? Pin
Ibrahim Dwaikat28-Oct-07 10:34
memberIbrahim Dwaikat28-Oct-07 10:34 
GeneralRe: How it works?? Pin
firmwaredsp31-Oct-07 23:47
memberfirmwaredsp31-Oct-07 23:47 
GeneralRe: How it works?? Pin
Jeff Morton28-Nov-07 4:44
memberJeff Morton28-Nov-07 4:44 
GeneralVery nice Pin
blackjack215023-Oct-07 2:01
memberblackjack215023-Oct-07 2:01 
QuestionHow To Get Frequency, or Period of the Wave? Pin
Paul Chin PC29-Sep-07 5:45
memberPaul Chin PC29-Sep-07 5:45 
QuestionDoesn't work :( Pin
Vladimir Grankovsky27-Aug-07 2:39
memberVladimir Grankovsky27-Aug-07 2:39 
AnswerRe: Doesn't work :( Pin
JeffMorton28-Aug-07 8:08
memberJeffMorton28-Aug-07 8:08 
GeneralRe: Doesn't work :( [modified] Pin
meliton gavia8-Jan-09 18:08
membermeliton gavia8-Jan-09 18:08 
AnswerRe: Doesn't work :( Pin
ajgreen198723-Jul-09 6:36
memberajgreen198723-Jul-09 6:36 
AnswerRe: Doesn't work :( Pin
Terricide15-Oct-09 23:11
memberTerricide15-Oct-09 23:11 
Questionquestion about wav using Pin
headburster22-Aug-07 0:29
memberheadburster22-Aug-07 0:29 
AnswerRe: question about wav using Pin
Jaguar++29-Aug-07 23:18
memberJaguar++29-Aug-07 23:18 
Questionvs version? Pin
headburster22-Aug-07 0:02
memberheadburster22-Aug-07 0:02 
AnswerRe: vs version? Pin
JeffMorton28-Aug-07 8:12
memberJeffMorton28-Aug-07 8:12 
GeneralThanks Pin
merlin98116-Aug-07 4:57
membermerlin98116-Aug-07 4:57 
GeneralThanks. this is what I was looking for. Pin
Michael Sync15-Aug-07 21:22
memberMichael Sync15-Aug-07 21:22 

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