Recording using more than two microphones simultaneously

What I want to do is sound source localization, by recording the sound source using a number of microphones and finding out the time delay of each data. Doing this, synchronization of recording is very important. I tried to record simultaneously using the code below:

recObj1 = audiorecorder(44100, 16, 1,1);

recObj2 = audiorecorder(44100, 16, 1,2);

record(recObj1,5)

record(recObj2,5)

i=0;

while i<350000

i=i+1

end

The reason I wrote the while construction is because when I don't give that spare time, the system returns error.(I don't know why) But still the result is not what it actually should be. I mean the recording is not simultaneously going. Random time delay occurs.

I am using two USB sound card to get two input microphones. Is this fact causing the problem? Or, I wonder if matlab is naturally not suitable for simultaneeous recording using more than two microphones.

Anybody knows how to record using two microphones simultaneously?

[DavidOviedo]

I have the same problem. You can see here http://www.mathworks.com/matlabcentral/answers/89057-delay-between-two-audiorecorder-orders

I'm ussing the same device with every microphone. It's a MOTU with 8 channels.

My code uses a pause instead of while. I have not problems with it.

In my experience, start orders are almost simultaneos. Instead, stop order are markedly delayed.

I can not be of more help, but I hoope someone knows answer.