I am trying to simultaneously playback and record a chirp signal. No sound is coming from my speakers. I pretty much copied the exampled from the matlab docs...

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Samuel Witt 2023-11-13

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https://ww2.mathworks.cn/matlabcentral/answers/2046275-i-am-trying-to-simultaneously-playback-and-record-a-chirp-signal-no-sound-is-coming-from-my-speaker

评论： Samuel Witt 2023-11-13

% Test signal generation
frameSize = 1024;
Fs = 44100;
t = 0:1/Fs:1; % Time vector for 1 second
testSignal = chirp(t, 20, t(end), 20000); % Sweep from 20 Hz to 20 kHz
testSignal = testSignal(:);
% Write the test signal to a WAV file
audiowrite('testChirp.wav', testSignal, Fs);
% Read the test signal from the file
fileReader = dsp.AudioFileReader('testChirp.wav', 'SamplesPerFrame', frameSize);
fs = fileReader.SampleRate;
% Initialize audioPlayerRecorder
aPR = audioPlayerRecorder('SampleRate', fs);
% Initialize file writer for the recorded signal
fileWriter = dsp.AudioFileWriter('recordedOutput.wav', 'SampleRate', fs);
% Play and record the test signal
while ~isDone(fileReader)
    audioToPlay = fileReader();
    [audioRecorded, nUnderruns, nOverruns] = aPR(audioToPlay);
    fileWriter(audioRecorded);
    
    % Handle underruns and overruns
    if nUnderruns > 0
        fprintf('Audio player queue was underrun by %d samples.\n', nUnderruns);
    end
    if nOverruns > 0
        fprintf('Audio recorder queue was overrun by %d samples.\n', nOverruns);
    end
end
% Release system objects
release(fileReader)
release(fileWriter)
release(aPR)