You'll also need to set LFO 1's Phase and Rate knobs where they're audible, so try
12 o'clock as a starting point (as usual, after sweeping them to catch their actual
voltage positions).
The pitch should oscillate up and down when you play.
Increase the MOD Amount to + or - 64, and it'll sound sci-fi. This is a good setting
to experiment with the Wave buttons to understand what they do.
MatrixBrute's LFOs have a choice of seven LFO waveforms, and you may be
surprised to see that they sound just like they look. Some of the same waveforms
are available in the VCOs, where they go by much faster, so this is a good way
to get a handle on how they sound.
Now the MOD Amount back to about 13, a vibrato effect.
The MatrixBrute's keys are pressure-sensitive. This is called Aftertouch, a
controller source when you push down the keys after the note has sounded.
We're going to use Aftertouch to increase LFO 1's rate a lot to bring in some reedy
growl.
Aftertouch is next to the letter J, but LFO 1's rate isn't one of the 12 hardwired
modulation destinations. Columns 13 - 16 are user-assignable to pretty much any
parameter on the instrument.
16 Arturia - MatrixBrute Manual - Guided Tour
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