Sending and receiving audio from the my sound card simaltainously

Hi im trying to use matlab to do some analysis on some speakers. i am trying to send a chirp out of the speakers and then record it back in at the same time can any one help?.

I am pretty new to mat-lab but so far i have tried the function 'soundsc' and also setting up a an in and out, i can do them separately but not together.

i have Standard Toolboxes with MAT LAB + Data Acquisition + Parallel Computing

This is how far ive got...

Cheers

f0 = 100; %Frequency at t0
f1 = 20000;
duration = 2; %time duration 
A = 2;  %Amplitude 
Pha = 0;    %Phase 
Fsampling = 48000;%sample rate 
ts = 1/Fsampling; % Interval Between samples 
t = 0:ts:duration; %time vector with steps of (ts)

AO = analogoutput('winsound', 0);
addchannel (AO, 1);
set(AO, 'SampleRate', Fsampling);
set(AO, 'TriggerType', 'Immediate');

AI = analoginput('winsound', 0);
addchannel(AI, 1);
set(AI, 'SampleRate', Fsampling);
set(AI, 'SamplesPerTrigger',Fsampling*duration);

testSig = chirp(t,f0,duration,f1,'logarithmic');

putdata(AO, [testSig']);

matlabpool open 2
parfor i = 1:2

    if i == 1;
  start(AO);
  wait(AO,5);
  delete(AO);

      else  
   start(AI);

msment = getdata(AI);

delete(AI);

wavwrite(msment,Fsampling,'newsample');
    end
end

i get this error when i run the code

MATLAB:dispatcher:loadLibrary Can't load 'C:\Program Files (x86)\MATLAB\R2012a Student\bin\win32\pctcustomattr.dll': The specified procedure could not be found.

. Caught MathWorks::System::FatalException

[Edric Ellis]

Does this happen with all PARFOR loops, or just that one? The error that you're getting is fairly weird, it looks perhaps as if your installation is somewhat broken.

Answer 1

[Jack]

Don't Worry Sorted it using this,

http://www.mathworks.co.uk/help/daq/start-analog-input-and-analog-output-simultaneously.html

i can compensate for the latency if need be later on.