Filter
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106 ARTURIA – MOOG MODULAR V 2.6 – USER’S MANUAL
Filter resonance, noted as “Q”
8.1.3 The amplifier or VCA
The amplifier (Voltage Controlled Amplifier) is charged with receiving the audio signal coming
from the filter (or directly the one from the oscillator if it is not filtered) to adjust its volume
with a knob, before the signal is directed to the speakers.
In conclusion, here is a scheme that may help you to understand the composition of a basic
sound:
8.2 C
OMPLIMENTARY MODULES
8.2.1 The keyboard
If we hold down a key at this stage, the sound you will get from the speaker will be uniform,
without life and without end. In fact, the oscillator delivers a continuous signal (the audio
output of a wave form) of a fixed pitch. In the scheme above, the only means of stopping this
sound that quickly becomes unsupportable is by lowering the filter cut-off frequency so that it
becomes more and more thick until it disappears; or more simply, to lower the volume of the
amplifier.
To trigger and stop this sound, and this, at the tone that we want, we use a keyboard, which
will be connected to the oscillator. This will “play” as soon as a key is pressed and will mute it
as soon as released. Of course, this connection is made through MIDI (it replaces the “gate”
type connection of analog synthesizers, which triggers the sound when the key is pressed and
stops when released).
In the second case, so that the sound is correctly tuned with the keyboard notes, we need to
apply a key follow modulation (replacing the 1Volt/octave control present on most analog
synthesizers).
To play the Moog Modular V with a MIDI keyboard, click on the “trigg in” plug of the output VCA and select the
“keyboard trigger” function. For more detail, see chapter 5 paragraph 1.1.5 “Output Amplifiers (VCA)”. Next select one
of the 4 key follow settings in the display “S1…4,off” on each “Driver” oscillator.
If you don’t have a keyboard, you can play on the Moog Modular V virtual keyboard.