How to save two sin waves with left and right channels in a stereo wav file?

Question

Omer Asif 2017-3-3

2
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/327913-how-to-save-two-sin-waves-with-left-and-right-channels-in-a-stereo-wav-file

评论： An 2024-2-6

采纳的回答： Star Strider

在 MATLAB Online 中打开

Hi,

I am using audiowrite to save two sin waves. Here is my code.

fs = 8000; %frequency sample rate
i=1/fs; % interval
t = 0:i:2; % time
phi = 0;
% F = 220Hz
f = 220;
x = A*sin((2*pi*f*t) + phi);
% F = 240Hz
f = 240;
y = A*sin((2*pi*f*t) + phi);
filex   =   'x.wav';
filey   =   'y.wav';
audiowrite(filex,x,fs);
audiowrite(filey,y,fs);

Now I want to save two separate waves as left and right channels in the a stereo wav file. How can I do that.

Many Thanks!

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Answer 1

Star Strider 2017-3-3

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/327913-how-to-save-two-sin-waves-with-left-and-right-channels-in-a-stereo-wav-file#answer_257129

编辑：Star Strider 2017-3-3

在 MATLAB Online 中打开

To create a stereophonic sound file, you need to create a (Nx2) matrix, so each channel is a column vector. In this example, ‘x’ will be the left channel, and ‘y’ will be the right channel.

The Code —

fs = 8000; %frequency sample rate
i=1/fs; % interval
t = 0:i:2; % time
phi = 0;
A = 1;
% F = 220Hz
f = 220;
x = A*sin((2*pi*f*t) + phi);
% F = 240Hz
f = 240;
y = A*sin((2*pi*f*t) + phi);
stereo_mtx = [x(:), y(:)];
audiowrite('stereo sound.wav', stereo_mtx, fs);