User Guide / Owners Manual

ARTURIA – Matrix-12 V – USER MANUAL 50
In a nutshell, Filter FM in Matrix-12 V uses the VCO 2 Triangle waveform to turn the
filter into an oscillator. This effect is best heard with a high Filter Resonance value,
and you may want to try different filter types and filter frequencies to get a feel for
what is happening. You may enjoy hearing the direct output of VCO 2 at the same
time, but for now leave it set to zero. There’s a particular “grunge” caused by Filter
FM that you’ll want to hear clearly.
And of course, your friendly neighbourhood Modulation Page stands ready to
control the VCO 2 frequency in any number of ways.
4.2.3 Filter
This parameter group contains one of the most distinctive features of the Matrix-12
V sound. Rather than merely offering the requisite Low Pass / High Pass / Band Pass
filters in 2- or 4-pole options, it offers some very unusual filter types as well. There are
15 filter modes in total!
As sound-sculpting tools, the filter parameters rival the oscillators for flexibility. Take a
look at the parameters:
4.2.3.1 Filter Frequency (Freq)
This is probably the first knob anyone tries on any synth: “How do the filters sound”.
The amount and type of change you hear depends on a number of factors, but rest
assured the Matrix-12 V filters provide just about anything you could want from an
analog filter.
Turning the knob changes the location of the corner point(s) of the filter, revealing
and/or hiding frequencies in the audio range depending on the selected filter
model.
4.2.3.2 Filter Resonance (Res)
To emphasize the corner point(s) at which the audio signal is being filtered, raise the
resonance level. The higher it goes the more obvious a filter sweep becomes, to the
point of “whistling” as certain frequencies are emphasized by the more powerful
filter modes. Self-oscillation is possible when the resonance is at maximum, so be
careful not to destroy any audio components (like your ears!).
4.2.3.3 Filter Mode
Sometimes it helps to have a visualization of something that affects the audio realm.
The following graphic actually opens up as a window inside Matrix-12 V when you
click in the Filter Mode value field. It shows all 15 of the Matrix-12 V filter modes: