Synthesis page
22
MS-20 LP/HP and Polysix
Gain
[Loud, Less Resonance; Unity, Less Resonance; Normal, 1-osc input; Normal, 2-osc input]
Gain is available only when Type is MS-20 LP, MS-20 HP, or Polysix. ese lter types include saturation, which
interacts with resonance. With anything other than very low resonance settings, input volume can have a strong eect
on their character. e lower the input gain, the more headroom remains for the resonance to bloom. Use Gain to set
the basic input level, and then ne-tune with Trim if desired.
Normal, 2-osc input: is is the lowest input gain. It will produce the classic resonant sounds of these lters even with
extremely loud input signals.
Normal, 1-osc input: is will produce the classic resonant sounds of these lters with a single oscillator playing at full
volume. When input is louder than a single full-volume oscillator, the resonance eect will be less pronounced.
Unity, Less Resonance: Volume is unattenuated. is leaves less headroom, so resonance will be less prominent.
Loud, Less Resonance: is provides a slight volume boost on input. is makes it easy to reach saturation with the
input level alone, leaving very little headroom for resonance.
Multi Filter
What’s a Multi Filter?
Standard multimode lters generate low-pass, high-pass, and band-pass lters simultaneously—but only let you use
one of them at a time. e Multi Filter gives you access to all three lter modes simultaneously, in any combination,
along with the dry input signal. You can choose from a large number of preset combinations, or create your own
complex lter modes using the Manual controls.
is is capable of some cool sounds in and of itself, but things really get interesting when you modulate Crossfade; see
below..
Crossfade
[0…100]
is is available only when Type is Multi Filter. Crossfade morphs between the Mode 1 and Mode 2 settings. 0 is
all Mode 1, 100 is all Mode 2, and 1-99 are intermediate values between the two Modes. Try modulating this with
envelopes, LFOs, or real-time controllers.
Preset (Multi Filter Preset)
[List of Presets]
is is available only when Type is Multi Filter. Presets let you quickly select from a number of useful combinations of
Modes 1 and 2. You can also select any combination you wish using the manual controls, described below.
1 (Mode 1)
[List of lter types]
is sets the lter type for Mode 1.
LP, HP, BP, and BR are the standard lter types. For more information, see “Filter” on page 20.
LP+BP, LP-BP, LP-HP, BP+HP, BP-HP, Dry+LP, Dry-LP, Dry+BP, Dry-BP, Dry+LP-HP, Dry+LP-BP, Dry+BP-LP,
Dry+BP-HP, Dry+HP-LP, Dry+HP-BP, LP+HP+BP: ese combine two or more lters at equal volumes. Dry is the un-
ltered input signal. e minus sign (“-”) indicates when the phase of a lter is reversed.
All On uses the Low Pass, High Pass, Band Pass, and Dry signals at equal volumes.
Manual lets you create your own mix of the lters; an additional four parameters will appear. For more information, see
“Manual,” below.
2 (Mode 2)
Mode 2 has the same selections as Mode 1.
Manual
When Mode is set to Manual, additional parameters appear so that you can create your own mix of the lters.
You may wonder why Band Reject is not included here. is is because it’s not a lter mode per se. Instead, it’s created
by equal amounts of High Pass and Low Pass. Try it and see!
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