I'm trying to analyze the frequency response of my phono cartridge and am using Wavelab 5. I have a test record with a 20-20k sweep. It seems that the FFT function of the Spectrum Analysis would do it, but I can't get the fft to recoginze the signal. I can create a standard waveform by recording the sweep, but can't figure out how to get that into the FFT analyzer to display a frequency response curve. Any help would be much appreciated.