Creating a real-time microphone signal visualization by dsp.AudioRecorder

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Marco 2013-1-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/58091-creating-a-real-time-microphone-signal-visualization-by-dsp-audiorecorder

Hi, because I use win-64, I found system object method as one only way to record from my computer's audio device.

So, I created this system objects:

S.har = dsp.AudioRecorder('NumChannels', 1);
S.hmfw = dsp.AudioFileWriter('myspeech.wav','FileFormat','WAV');
hmfr = dsp.AudioFileReader('OutputDataType',...
   'double');

and a while loop as:

tic;
while toc < 10,
     step(S.hmfw, step(S.har));
     d=step(hmfr);
end
release(S.har);
release(S.hmfw);
release(hmfr);

I checked the matlab help for the visualization and I found TimeScope system object for do that but I need one handle figure to attach on a GUI interface.

How can I visualize the sound from my computer's audio device in real time ? I thought the function "plot" but I don't know where use it in the script and what should be its arguments.