Filters remove frequencies from the sound sources coming from the Mixer
see Mixer Section [p.28], and they are a primary component in the subtractive
synthesis technique used by the MatrixBrute and all analog synths. Modulating
them varies the timbre of the sound over time. With very high Resonance levels
they can self-oscillate, becoming another sound source.
MatrixBrute features two multimode Voltage-Controlled Filters (VCFs):
• The Steiner Filter (VCF 1) was designed by Nyle Steiner in the '70s.
It has a unique character that becomes apparent immediately at
relatively pronounced settings.
• The other filter is a classic Ladder Filter (VCF 2), a famous standard-
bearing design known for its rich, thick sound; unlike the original, this
one is gain-compensated to avoid the dip in volume that you find at
higher resonance level. This one also is a multimode filter and has both
12dB per octave and 24dB per octave options. These filters play a big
role in the MatrixBrute's character.
Both filters have the same basic parameters, but the Steiner Filter has a couple
of additional ones.
Arturia - MatrixBrute Manual - Operation 31
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