The central parameter in a filter is the corner frequency or frequencies where it
starts cutting. This is called Cutoff in synths. Maxibrute has two places to adjust
this:
• Cutoff sets the corner frequency/frequencies individually for each
filter. These are then fed to a combined control:
• Master Cutoff is a prominent knob that sweeps both filters' cutoffs
together.
The word "multimode" means the filter can adopt different curves, which also
change the sound completely.
Mode selects these curves:
•
LP (Lowpass)
does just that - allow low frequencies to pass while high
frequencies are attenuated.
•
BP (Bandpass)
allows a band of frequencies to pass while blocking
everything else. Another way to look at it is that the treble and bass are
turned down, leaving a midrange band.
•
HP (Highpass)
allows high frequencies to pass while low frequencies
are blocked.
•
Notch (Steiner/Parker filter only)
removes a narrow band of
frequencies.
The slope of the filter's roll-off changes the sharpness of the sound.
• Slope selects either the 12dB or 24dB per octave setting. Usually 12dB
sounds brighter.
• Drive adjusts how hard the signal hits the filter. The higher you set it,
the more pleasant distortion you get.
• Brute Factor™ is Arturia secret sauce. It ranges from warming up the
low end to creating a monstrous growl when turned up. The exact
effect depends on how it's interacting with other settings.
• Resonance emphasizes the frequencies at the point of the cutoff,
because they're fed back into the circuit. Higher resonance levels can
cause the filters to self-oscillate. NOTE: The Steiner filter does not track
the keyboard well over a wide range by nature. For better pitch to
octave tracking, using the Ladder filter.
• Env 1 Amt sets how much Envelope 1 (the one dedicated to the VCFs)
modulates the Cutoff frequency. This control allows for both positive
and negative modulation amounts.
32 Arturia - MatrixBrute Manual - Operation
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