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Be the DJ
Same music r(t)Input unchanged
Equalizer G(s)You change this
Sound you hear y(t)Output changes
Play → move one fader → watch the curve.
Paused · press Play to listen
120 Hz0.0 dB→×1.00 amplitude
Boost bass. Where does the curve rise?
Why this graph?
The input music stays the same. The faders change the equalizer G(s), so the output sound changes.
Music contains many frequencies. Each fader changes the gain around one frequency band.
Left = bass. Right = treble. Higher = more amplification.
At a chosen frequency: output amplitude = input amplitude × gain.