MATLAB: Reading audio

speech processing

 I recorded my voice and then converted that file to .wav format.

then I did the following

y=wavread('filename'); sound(y);

But I couldn't hear my voice. What is the problem?

Best Answer

Difficult to say. You might not have a speaker or sound card connected, or its volume might not be up high enough or it might be muted.

Or perhaps you should be using

[y,fs] = waveread('filename');
sound(y,fs);

Related Solutions

MATLAB: I was trying the handel.m audio example for some testing, and now it is the ONLY sound I can listen to! PLEASE HELP!

If you run:

[y, Fs] = audioread('president-is-moron.wav');
sound(y, Fs);

and hear "Handel", this wave file contains the sound of the file "handle.mat".

Or, as Walter said already, either audioread or sound has been overwritten by something, which let you hear an unexpected signal.

MATLAB: How to change the sampling frequency of audio signal

audiowrite(filename) is going to fail because you must provide at least 3 parameters to audiowrite: filename, samples, and output frequency.

If you do not want to overwrite the original file then supply a different file name. For example,

newfile = tempname();
audiowrite(newfile, y, fs2);

If all you are going to do with it is read it back in again, then it is pointless to do so: you are just going to get y and fs2 back again. audiowrite() does not resample the data: it just writes the frequency in the header, and whatever tool you use to play the sound is responsible for taking care of the frequency. For example,

sound(y, fs);
sound(y, fs/2);

You probably want resample(), or fft() then ifft(), or interp1()

Best Answer

Related Solutions

MATLAB: I was trying the handel.m audio example for some testing, and now it is the ONLY sound I can listen to! PLEASE HELP!

MATLAB: How to change the sampling frequency of audio signal

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