Connecting a Presonus Audiobox to Labview

[bfresh]

Is there anyway to hook up an audiobox through usb to collect frequency signals off of a guitar?  We need to collect and do the spectrum analyisis in real time.  We are hoping that all we need to do is get Labview to recognize the drivers from the audiobox.

Thank you.

[NIquist]

There is a way but it's probably non-trivial.  You'll need to get the Audiobox DLLs and then use a Call Library Function Node to access its functions and data. 

It would be far easier to get a USB-6009 or other cheap DAQ that already has LabVIEW drivers and collect your audio that way.

[bfresh]

We have tried using that daq but the signal was no where near as usable.  I am not sure if the daq was the problem or if it was the way we had the guitar hooked up to it, but the plot of the signal was very noisy.  Could you recommend a better daq than the 6009 or be able to elaborate on how to load the audiobox drivers?  We are meeting with our professor who knows labview better than me and my partner so he may know how to do this, but we would like to figure it asap.

Thanks for the reply,

Brian

[Coq_Rouge]

How about using the sound card? And did you setup the USB input channel correct, not using differential mode on a single ended signal. By the way what is output signal level from the guitar amplifier 

Post VIs and connection diagram.

[NIquist]

The USB-6009 is only 14-bit (48KHz) so it's not great for audio.  Have you tried the standard Sound VIs to see if they can find your Audiobox through the OS?  Open the Continous Sound Input Example and try different device IDs and see if you get a signal through.

[PhillipBrooks]

The web site for this device indicates it supports ASIO, Core Audio, Direct Sound (Windows XP), Windows Audio Session API (Windows Vista and Windows 7).

Search the NI forums for these standards...