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I solved the problem, We can choose between Mic and Line In by changing the device ID. But I have another problem, I want to read both Line In and Mic in simoltaneously. I try to read both of channels by following code.
But one of sound inputs configuration makes error and can't open the device. How can I read them simoltaneously?
Does your operating system allow both devices to be used simultaneously? LabVIEW does not control the sound devices directly but through the OS. If there is only one A/D converter, then it may only be possible to use one input at a time.