User Manual

4.3.5. Noise Generator
The definition of noise is a random waveform, so it's unpitched. The MatrixBrute offers four
noise types, and the difference is in their frequency spectrum.
As a practical description, blue noise has the most energy in the high frequencies and least
in the low ones, then white sounds a little lower, followed by pink, and finally red sounds
the lowest. Noise can be an important component of a sound, adding some grit, or it can be
used to modulate another wave.
Noise Type selects the four types successively, and each one has an appropriately colored
light.
4.4. Audio Mod
In addition to making sounds, the VCOs can modulate other VCOs and the two VCFs
(Voltage-Controlled Filters). These will create more character and add harmonics to the
sound of the modulation destination.
When the VCOs modulate other VCOs, it's called Frequency Modulation - FM.
• VCO 1 > VCO 2 adjusts how much VCO 1 modulates VCO 2.
• VCO 1 < VCO 3 > VCO 2 lets VCO 3 modulate VCO 1 or 2. It modulates neither
when the knob hits its center detent.
• VCF 1 < VCO 3 > VCF 2 lets VCO 3 modulate VCF 1 or 2. It modulates neither filter
when the knob is in its center detent.
• VCO 1 < Noise > VCF 1 lets the Noise oscillator modulate VCO 1 or VCF 1. Again, it
does neither when the knob is centered in the detent.
For the bi-polar knobs to be used in the modulation matrix, you will need to turn the knob in
the direction that you want it to modulate when assigning it. There is a small dead zone on
either side of the center detent that will allow you to have no modulation but still allow the
knob position to be sensed.
4.5. VCO Sync
VCO 2 > VCO 1 causes VCO 1 to follow VCO 2's pitch when it's engaged. Turning VCO 1’s
Coarse knob will allow you to hear the classic harmonic sync sweep sound.
21 Arturia - User Manual MatrixBrute - Operation