theory

how it works

the waveGUIde(tm) software plays "white noise", a signal which is known to have equal power at all frequencies, through the audio system

the sound is simutaneously recorded with a microphone and its frequency content is analyzed using a Fast Fourier Transform(FFT)

the resulting frequency spectrum shows what distortions the speaker are introducing to the music

correcting these distortions (with graphic equalizers or speaker modifications) is an effective way to improve the fidelity of the system