Microphone Signal Directly into Labview

[ji1234]

I am interested in analyzing an microphone input signal in Labview.  I have read that you can use a DAQ board to do this.

I am wondering if it is possible to put the signal directly into labview (without using a DAQ board); by just using the 2.5mm jack on the computer, can you get a voltage that can then be fed into Labview for analyzation.

Thank you
Jen

[Dennis_Knutson]

Look at the sound card examples. There's even Express VI called 'Acquire Sound'.

[ji1234]

Hmm.. It looks pretty simple, but when I try the NI examples or the express VI, I get an error (Hex 0x12CB) Cannot support sound format.  The device does match the microphone on my computer, so any ideas on what the problem could be?

Thank you

Jen

[Dennis_Knutson]

Do you have multiple sounds cards in your system? Are there multiple choices for the device in the Express VI?

[ji1234]

No.  There is only 1 soundcard.  The VI does allow you to select the device that you want when you set it up, but device 0 (default) does match the appropriate system for my computer.

Thank you
Jen

[Dennis_Knutson]

Not sure what would cause the error. What settings did you select? Have you tried a different number of channels or a different sampling rate?