Recording and reading audio in realtime

Question

Michael Salvati 2017-5-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/339720-recording-and-reading-audio-in-realtime

回答： Puneet Rana 2017-5-12

I am trying to use the Audio System Toolbox to record audio to a file in real-time, and read from the file in real-time as well, but am having issues. In the RealTimeStreaming example, this is done, but I cannot seem to imitate it. The audio recording works fine, but when I play the file in real time, all I get is a popping sound out the speakers. Can someone correct whatever error I have in the code?

deviceReader = audioDeviceReader;
setup(deviceReader);
fileWriter = dsp.AudioFileWriter(...
    'mySpeech.wav',...
    'FileFormat','WAV');
File = dsp.AudioFileReader('mySpeech.wav');
Fs = File.SampleRate;
Out = audioDeviceWriter('SampleRate', Fs);
disp('Speak into microphone now.');
tic;
while toc < 10
    acquiredAudio = deviceReader();
    fileWriter(acquiredAudio);
     step(Out,Fs);
end
disp('Recording complete.');
release(deviceReader);
release(fileWriter);

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Answer 1

Puneet Rana 2017-5-12

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https://ww2.mathworks.cn/matlabcentral/answers/339720-recording-and-reading-audio-in-realtime#answer_266795

Hi Michael,

What do you want the audioDeviceWriter to play? The recorded audio? The audio from a file? In either case, the second input to step() method of audioDeviceWriter object needs to be the audio you want to play. In your code, you are just passing a scalar 'Fs' to it.

HTH,

Puneet