Filter - Korg Opsix Owner's Manual

FILTER

FILTER
TYPE (Filter Type)
This is used to select the filter type. The resulting sound will be different depending on the selected
filter type. For LPF, HPF, BPF and BRF, the digits at the end of the filter name (6, 12, 24) indicates the
filter characteristics (dB/oct). The larger the value, the more abruptly that the filter will cut off the
sound at the cutoff frequency.
LPF 12, LPF 24: This cuts out the parts of the sound which are higher than the cutoff frequen-
cy. Low Pass is the most common type of filter, and is used to make bright timbres sound darker.
HPF12, HPF24: This cuts out the parts of the sound which are lower than the cutoff frequency.
These filters are effective when the low end is too strong, or when you want a thinner sound.
BPF6, BPF12: This cuts out all parts of the sound, both highs and lows, except for the region
around the cutoff frequency. Because of this, the sound can change dramatically depending on
the cutoff setting and the Operator's sound settings. With low resonance settings, you can use the
Band Pass filter to create telephone or vintage phonograph sounds. With higher resonance
settings, it can create buzzy or nasal timbres.
BRF6, BRF12: These are also called "notch filters" because of the dip in the midrange levels.
Only the parts of the sound at and directly around the cutoff frequency are cut off. Try modulat-
ing the cutoff with an LFO to create phaser-like effects. This filter type–also called a notch
filter–cuts only the parts of the sound directly around the cutoff frequency. Try modulating the
cutoff with an LFO to create phaser-like effects.
LPF MS-20, HPF MS-20: Both of these are 12dB/oct filters that can self-oscillate and replicate
the distinctive tonal character of the Korg MS-20. If the input level is high, raising Resonance will
cause increasing amounts of saturation and overdrive, creating a more aggressive tone.
LPF Poly6: This is a 24dB/oct filter that can self-oscillate, which replicates the powerful yet
sweet tonal character of the Korg Polysix.
ENABLE
Switches the filter effect on/off.
CUTOFF
Sets the cutoff frequency of the filter in Hz. As explained above, the cutoff frequency effect will differ
depending on the type you select. The range of most filter types is from 6.489 Hz to 23.68 kHz, but
the range of the MS-20 LPF/HPF and LPF Poly6 is from 12.98 Hz to +21.10 kHz.
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