A Filter is used to cut-off or cut-down the brightness to so mething more suitable. This resultant sound is routed to an amplifier. Filter in music eliminates some unwanted frequencies from a signal or sound wave.
Sound is created by vibrations. In music world , all musical instruments creates different type of sound wave vibration. The Pitch is the frequency of sound wave vibrations and measured in hertz (abbreviated Hz).
Frequency is the number of waves that pass a given point in a certain amount of time. In other word , the total number of vibrations or oscillations made by the particles per unit time is called the Wave Frequency.
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