How can I process audio to get frequencial information in real time?

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Xavi Bañuls Juan
Xavi Bañuls Juan 2014-11-26
回答： Puneet Rana 2014-12-2
I need to process an audio signal (recorded in real-time) to plot the frequency variation as a function of time.
I've programmed an autocorrelation LPC code to get the plot from a WAV file, but now I have to do that in real-time, getting the signal "From Audio Device" (DSP System Toolbox - Simulink).
Which blocks should I use to get that real-tome plot in Simulink?
Thanks. Xavi.

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回答（1 个）

Puneet Rana
Puneet Rana 2014-12-2
Try the Spectrum Analyzer block: http://www.mathworks.com/help/dsp/ref/spectrumanalyzer.html
It also has a 'spectrogram' mode that can show frequency variation across time.

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