conversion of a sound signal into frequency domain

[Getwonder]

hello,
i m having a signal form a sound wave file and plotting it on the waveform graph. this is displaying the waveform on time domain. if i want to see the result in the frequency domain what must i have to do.

[Dennis_Knutson]

There are numerous shipping examples on doing an FFT of a captured signal to display it in the frequency domain. Use the Example Finder to do a search of "spectrum". There's also some examples of sound cards and .wav file recording and saving. For your FFT, you will need to know the sample rate of the captured signal.