Low-pass Filter

Low-pass filter Subtractive Synthesizer

The filter allows greater control over a synth’s timbre.

The low-pass filter preserves the low-frequency harmonics of a note and removes the higher frequency harmonics.

Try changing the filter’s cutoff frequency with the slider below. Harmonics above the cutoff will be filtered out. Press the piano keys below to play notes and hear the result.

Using a filter to subtract harmonics from an oscillator’s raw waveform gives subtractive synthesis its name.
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