
Subtractor Synthesizer
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24 dB Lowpass (LP 24)
Lowpass filters lets low frequencies pass and cuts out the high frequencies.
This filter type has a fairly steep roll-off curve (24dB/Octave). Many classic
synthesizers (Minimoog/Prophet 5 etc.) use this filter type.
The darker curve illustrates the roll-off curve of the 24dB Lowpass Filter. The lighter
curve in the middle represents the filter characteristic when the Resonance parameter is
raised.
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12 dB Lowpass (LP 12)
This type of lowpass filter is also widely used in analog synthesizers (Ober-
heim, early Korg synths etc.). It has a gentler slope (12 dB/Octave), leaving
more of the harmonics in the filtered sound compared to the LP 24 filter.
The darker curve illustrates the roll-off curve of the 12dB Lowpass Filter. The lighter
curve in the middle represents the filter characteristic when the Resonance parameter is
raised.
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