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Audio signal characteristics information

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RoboKid
RoboKid on 14 Nov 2013
Edited: Walter Roberson on 14 Nov 2013
I wanted to analyse the audio signal, it's amplitude, frequency, etc. using matlab.
What's data stored by 'getaudiodata' ,I understand that the audio signal gets quantified in magnitude and time. I appreciate all comments.
% Record audio signal for 5 seconds.
recObj = audiorecorder;
disp('Start speaking.')
recordblocking(recObj, 5);
disp('End of Recording.');
% Play back the recording.
play(recObj);
% Store data in double-precision array.
recordedSig = getaudiodata(recObj)
% Plot the waveform.
plot(recordedSig);

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