How to plot WAV file

Hello,

I'd like to plot .wav file in time and frequency domain.

Answer 1

[Wayne King]

If this is the output of wavread, then see if you have two channels in y

[y,fs] = wavread(filename);

If y is two-channels, Nx2, then just plot one:

    y = y(:,1);

    dt = 1/fs;
    t = 0:dt:(length(y)*dt)-dt;
    plot(t,y); xlabel('Seconds'); ylabel('Amplitude');
    figure
    plot(psd(spectrum.periodogram,y,'Fs',fs,'NFFT',length(y)));

[Wayne King]

so are these saved in a .wav file as two channels? one for the right ear and one for the left?

If so, then just do

yright = y(:,1);

yleft = y(:,2);

or however it is.

[Daniel Shub]

@John, Pardon the yelling: THE MIT KEMAR HRTFS ARE NOT GIVEN FOR THE RIGHT AND LEFT EARS. Please read the documentation about how they recorded the HRTFS.

[Maurel]

Hi !! thanks for your helpful post. I wonder if the unit is volt or mV ? Please can you confirm me that the unit of the amplitude axe is in Volt (or mV) ? thank !!

[muhammad faiz]

hi sorry, but why it display "Undefined function or variable 'wavread'." after i run this coding "[y,fs] = wavread(filename);" ??

[Florian Schüling]

try: [y,fs] = audioread ('Filename')

[maithri kodakandla]

thank you :)

[Natalie Phillips]

Hello Wayne King,

Could you explain the variables and why you put them in the format you did? If you can explain your code with comments that would be helpful.

Thank you,

Natalie

[Eshaan Goyal]

what should be its xlabel and ylabel (for the graph which is plotted)

[irtaza mazhar]

wht if channel is 1??

[Anzzza]

when you have stereo audio, you got two channels. if you can, it's easier to work with one