hi

I have a double data-type array.
when I write it into wav audio file using audiowrite, and later read it using audioread, i get different values from the original array.
they are both double, but still, values are different.

any ideas?

 

hi

I have a double data-type array.
when I write it into wav audio file using audiowrite, and later read it using audioread, i get different values from the original array.
they are both double, but still, values are different.

any ideas?

Can you post your MATLAB code?

 

Can you post your MATLAB code?

the values in wmed_signal1 and eval_signal_en are very close, but still differ.
I need them too be exactly the same

 

Can you cut and paste the code as simple text?

 

Can you cut and paste the code as simple text?

audiowrite('wmed_signal1.wav' , wmed_signal1, Fs);

eval_signal_en = audioread('wmed_signal1.wav')';

 

audiowrite('wmed_signal1.wav' , wmed_signal1, Fs);

eval_signal_en = audioread('wmed_signal1.wav')';

Apparently audioread and audiowrite are using different formats or is doing some signal processing to the data.
What is your sampling frequency Fs?
Do you still have wavread and wavwrite on your version of MATLAB?

 

OK fellows I had figured it out.
I had to add the arguments ('BitsPerSample', 64) to audiowrite function.

Thank you for your replys

 

Hi Noy Uzrad

you are missing the actual 'send-to-speakers' command

sound(y,Fs)

the audioread command only loads from the audio file to MATLAB workspace, it doesn't actually play it.

The reproduction of the audio file requires Fs to be specified, that is precisely the 2nd input field of command sound.

regards

John BG

 

Hi Noy Uzrad

you are missing the actual 'send-to-speakers' command

sound(y,Fs)

the audioread command only loads from the audio file to MATLAB workspace, it doesn't actually play it.

The reproduction of the audio file requires Fs to be specified, that is precisely the 2nd input field of command sound.

regards

John BG

Nice of you to contribute your MATLAB expertise.
Please do not Post Reply to old threads, especially when the problem has been solved and the TS is long gone.