The Lower Controller Panel - Arturia CS-80 V User Manual

5.2.2.7. Keyboard Control
Sometimes it's useful to alter how a sound responds to high vs. low notes. Keyboard tracking
of VCF cutoff has been a staple of analog synthesizers for decades. The CS-80, and CS-80
V, offer a take on this that has been a huge influence on later synthesizers.
Rather than a single tracking amount for Brilliance (VCF cutoff), CS-80 V has four levers to
offset both Brilliance and Level for Low vs. High notes. As they're adjusted in various ways,
you can make a patch soft at the extremes of the keyboard and louder in the middle, roll off
the bass for high notes while boosting the treble for low ones, and much more.
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This idea of keyboard scaling was one that Yamaha later put to very good use. It became one of
the critical elements of FM synthesis, with a graph of keyboard level scaling boldly printed on the front
panel of the DX7 – one of the most successful synths in history.

5.2.3. The lower Controller Panel

5.2.3.1. Modulation
The original CS-80 didn't have a modulation wheel; it relied entirely on Initial Touch, After
Touch, and expression pedals to shape note behavior. These days, mod wheels are on every
controller, so why not teach CS-80 V to use them in various ways?
The WHEEL can be used instead of an actual mod wheel. On the original CS-80, this dual
knob was for coarse and fine tuning.
The five levers control how much the mod wheel controls the Sub Oscillator SPEED, and how
much it turns up the Sub Oscillator's modulation of the VCO, VCF, VCA, and PAN.
The HOLD button causes notes that you play to sustain indefinitely – or at least until you
push the button again.
Arturia - User Manual CS-80 V - The Main Panel 65