Recording and reading audio in realtime

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);

Answer 1

[Puneet Rana]

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