Manx SJ-2, Руководство пользователя

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When an equalizer (EQ) or filter is applied to a sound, it is adjusting the relative balance of the component
sine waves in that sound. A sound which is bright will have louder high frequency sine waves than a sound
which is dull.
As you can see a regular waveform which is not a sine wave begins to emerge. It turns out
that when many different sine waves are added together, the resulting wave-shape can be
anything at all. In complex cases such as speech, you are still hearing a ‘chorus’ of sine
waves, but in this case, the relative volumes and pitches of those wave would be constantly
If we add yet another sine wave, higher pitched and quieter than the others, we get this:
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An EQ device
SJ-2 filter
25 Appendix One - Audio filters
changing.