Akai mfc42 Manuale Utente

As the coffee filter, it separates one to pass through

and the other to block. In sound application, the

separation is determined by their signal frequencies.

This particular criterion frequency is called as “cut-off

frequency”. There are several filter types of different

characteristics.

The point specified in frequency that determines where the filter effect takes place. The filter separates the

signal, to pass or cut-out, referenced to the cut-off frequency. Changing the cut-off frequency changes the

sound character.

It accentuates the frequency components near the cut-off frequency to give sound the distinguish

character. It oscillates when it’s overdone.

Cuts out the frequency components adjacent to the cut-off

frequency and passes through the higher and lower

frequency components.

Note: The CUTOFF knob may not change the sound

character as the depth of filter notch is lessened when

RESONANCE knob is turned up.

<HIGH PASS>

Passes the frequency components higher than the

cut-off frequency and cuts out the lower frequency

components.

Passes the frequency components adjacent to the

cut-off frequency and cuts out the higher and lower

frequency components.

Passes the frequency components lower than the cut-off

frequency and cuts out the higher frequency components.

         Frequency response in original

Level

   

Low

Frequency

High

   

Low

Frequency

High

   

Low

Frequency

High

Level

Level

Cutoff frequency

Cutoff frequency

   

Low

Frequency

High

Level

Cutoff frequency

   

Low

Frequency

High

Level

Cutoff frequency

passes through filter ···