sampling audio signal

how to plot an audio signal (.wav) in matlab

Answer 1

[Paulo Silva]

[x,fs] = wavread('file');
t = 0:1/fs:length(x);
plot(t,x);

for stereo files

[y, fs]=wavread(fileName);  % Read wave file
sound(y, fs);      % Playback
left=y(:,1);      % Left channel
right=y(:,2);      % Right channel 
subplot(2,1,1), plot((1:length(left))/fs, left);
subplot(2,1,2), plot((1:length(right))/fs, right);

[hemalatha]

i unable to get the plot of left and right..please explain the program

Answer 2

[pooja thosar]

can u tell me how to play two different audio signals, i.e. one audio on right channel and one audio on left channel

[Walter Roberson]

Create a matrix in which the left channel is in column 1 and the right channel is in column 2. (If one column would be shorter pad it with 0 to be the same length as the other.) Now play the combined matrix.

Answer 3

[Lijia Liu]

how to make two wavefiles of different size equal to over this error: Dimensions of matrices being concatenated are not consistent.

[Walter Roberson]

Are you trying to make them multiple channels of the same sound? Are you trying to concatenate them together but some of them have different number of channels than the others?