How to access both channels of soundcard

Could anyone has any idea how i could access both channels of sound card at the same time .

Thank you

Answer 1

[Jan]

It depends on what "access" exactly means. If you show us, how you access one channel, an answer might be very easy. If you e.g. use the audio-recorder and mean capturing a stereo signal, there should not be a problem at all.

[Walter Roberson]

Right, it normally happens automatically if you are using the default audio.

If the sound card is being access through the data acquisition toolbox then we need to know more about it.

[seme]

Thank you Jan Simon

Here is an example code to output to the sound card that i try

AO = analogoutput('winsound',0);
chan = addchannel(AO,2);
duration =1;
SampleRate = 44100;
set(AO,'SampleRate',SampleRate)
set(AO,'TriggerType','Manual')
NumSamples = SampleRate*duration;
x = linspace(0,2*pi*500,NumSamples);
y = linspace(0,(2*pi*500)-1.57,NumSamples);
data = sin(x)';
data1=sin(y)';
putdata(AO,data)
start(AO)
trigger(AO)
waittilstop(AO,5)
delete(AO)
clear AO

what i want is to output the data1(Sin(y)) in the second channel(channel 2)) , while I send to data(Sin(x)) sound card to channel 1

Thank you