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Interactive Power Spectrum Demo, Version 2

10 May 2007 (Updated 18 Sep 2009)

Interactive signal generator with power spectrum display and sound output

File Information
Description	Digital signal generator (sumulator) with power spectrum display and sliders for "real time" control, useful for teaching and demonstrating the power spectra of different types of signals and the effect of signal duration and sampling rate. Version 1.1 adds sound output. The signal slider selects from 10 different signals (you can change these in RedrawSpectrum.m). The Time slider controls the total duration of signal, the Rate slider controls the sample rate, and the F1 and F2 sliders control the global variables f1 and f2 which are used in different ways in the different signals. The Sound slider has only two settings: OFF (down) and ON (up). When Sound is ON, each time a slider is moved, the signal (y) is sent to the Windows WAVE audio device. When Sound is OFF, no sound is played when a slider is moved. However, even when Sound is OFF, clicking on the Sound slider plays the signal once for each click. T. C. O'Haver (toh@umd.edu), version 1.1, May, 2007
MATLAB release	MATLAB 6.5 (R13)
Zip File Content
Other Files	license.txt, PowerSpectrumDemo/AmpMod.bmp, PowerSpectrumDemo/Burst.bmp, PowerSpectrumDemo/DemoPowerSpectrum.m, PowerSpectrumDemo/f1Slider.m, PowerSpectrumDemo/f2Slider.m, PowerSpectrumDemo/FreqMod.bmp, PowerSpectrumDemo/gaussian.m, PowerSpectrumDemo/GaussSine.bmp, PowerSpectrumDemo/NoisySine.bmp, PowerSpectrumDemo/Oscillationtest.m, PowerSpectrumDemo/ReadMe.txt, PowerSpectrumDemo/RedrawSpectrum.m, PowerSpectrumDemo/rtslid.m, PowerSpectrumDemo/SampleRateSlider.m, PowerSpectrumDemo/SamplingtimeSlider.m, PowerSpectrumDemo/SignalSlider.m, PowerSpectrumDemo/sine.bmp, PowerSpectrumDemo/SoundButton.m, PowerSpectrumDemo/Square.bmp, PowerSpectrumDemo/Sweep.bmp, PowerSpectrumDemo/Thumbs.db, PowerSpectrumDemo/Triangle.bmp, PowerSpectrumDemo/Version11.GIF, PowerSpectrumDemo/WhiteNoise.bmp

Tags for This File
Everyone's Tags	power spectrum signal harmonic sampling aliasing frequency times, spectral analysis
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Comments and Ratings (2)
06 May 2008	Kartika Munir
12 Aug 2008	Lei Qiu	good package

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Updates
16 May 2007	Enhancements
18 Sep 2009	Slider function modified by commenting out lines 337 and 373 to prevent crash on Matlab 2008 and 2009.

Tag Activity for this File
Tag	Applied By	Date/Time
spectral analysis	Tom O'Haver	22 Oct 2008 09:12:27
power spectrum signal harmonic sampling aliasing frequency times	Tom O'Haver	22 Oct 2008 09:12:27

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