Yes, there are several functions in the CVI analysis library (and in the CNiMath class in C++, and the CWDSP ActiveX control) that will let you do spectral analysis. These functions are Spectrum, CrossSpectrum, AutoPowerSpectrum, etc. There is a CVI example of a spectrum analyzer under cvi\samples\apps\spectrum\spectrum.prj. Note, you need the full version of Measurement Studio or CVI to get the analysis library functions.
Best Regards,
Chris Matthews
National Instruments