Capture PC microphone line in signal

[guangdew1]

I'm aware LabVIEW's Sound VIs and I used them often. My question here is that if I have a line in signal plugged into the microphone port, how can I capture it. There is no microphone involved, just a line in sine wave signal.

Thanks for help,

[GovBob · Accepted solution]

You would use the same vi's as if it were a microphone.

The limitations will be in the abilities of your sound card to digitize the sine wave and not the limitiations of LabVIEW per se.

[guangdew1]

Hi GovBob,

I tried it and it actually worked, even though I don't know why. I also tried this way, but it doesn't work, after I set it to line in, I couldn't see any input. If it works, I will also have problem about how to set to the line in mode through cmd line.

Thank you for your help.