MATLAB: How to play two different tones at the same time and save as WAV file in matlab

headphoneisileft channelright channeltwo different toneswav file

Hi, I want to play two different tones at a same time, but one of the tone on left channel of headphone and another one on right channel. The whole period of tone is 2 minutes and the inter-stimulus-interval is 2s. After that save as WAV file. The Matlab code as shown below. Any help will be appreciated.
fs=10000;          % sampling frequency 
tone_dur=100e-3;   % tone duration, 100ms
t=0:1/fs:100e-3;  
f1=1000;           % tone frequency 1 = 1000Hz
f2=1500;           % tone frequency 2 = 1500Hz 
MymonoL=sin(2*pi*f1*t)'; 
MymonoR=sin(2*pi*f2*t)';
Mysound = [MymonoL MymonoR];
n=100e-3*fs+1; %no of sample per tone
%%Generate a 2 minutes (120s) vector
total_time = 120;
total_time_sample = total_time*fs; % total no of time sample in 120s
sequence=zeros(total_time_sample,2); 
temp = 0; % temporary total number of samples
while(temp < total_time_sample)
% Inter-stilulus-interval (ISI)= 2s
ISI_interval = 2*fs; % number of sample per ISI
temp = temp+ISI_interval;
sequence(temp+(1:n)) = Mysound;
if temp+ISI_interval > total_time_sample
break;
end 
end
wavwrite(sequence,fs,32,'tonesLR');

Best Answer

Change
sequence(temp+(1:n)) = Mysound;
to
sequence(temp+(1:n), :) = Mysound;
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