MIDI

Synthesizer: Filter (3)

The Music Telegraph | Text 2019/07/02 [13:11]
MIDI

Synthesizer: Filter (3)

The Music Telegraph| 입력 : 2019/07/02 [13:11]

▲ The filter from Mini Moog

© MusicTech.net

 

 

 

Synthesizer: Filter (3)

 

1) Low-Pass Filter (LPF)

The Low-Pass Filter eliminates the frequency above the Cutoff frequency. Because this mechanism of Low-Pass Filter is very similar to the spectral changes in synthesizers, Low-Pass Filter is most useful and used widely in synthesizers.

 

When the cutoff value increases, more partial frequencies pass through the filter, and at the same time, the high frequency passes through a lot, so the sound becomes brighter.

 

In Analog synthesizers, a waveform like a sawtooth wave is made from an oscillator and sent to a filter, so there is always a change of sound due to the operation of the Cutoff filter.

 

However, it is different in the synthesizer of the Pulse Code Modulation (PCM) method played by sampling. In general, filter is similar to equalizer in some ways but it is fundamentally different in PCM type of synthesizers. If a sampled sample does not have a high frequency partial, no matter how much the Cutoff filter manipulates it, the high frequency does not generate. This should be careful in synthesizers using sampling rather than oscillators.

 

 

▲ Low-Pass Filter

© The Music Telegraph





  

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