Arturia cs-80v User Manual

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ARTURIA – CS-80V – USER’S MANUAL
 
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With a high resonance level, the filter will begin to produce a sound close to a sine 
waveform. At this stage, the use of a key follow is very important as you can create a 
melody by tuning the cut-off frequency of the filter with the frequency of the oscillators. 
 
 
The filter settings of the CS-80V 
 
6.1.3  The amplifier or VCA  
 
The amplifier (Voltage Controlled Amplifier) receives the audio signal coming from the 
filter (or directly from the oscillator if it is not being filtered) to adjust the before the 
volume is sent to the outputs.  
 
 
The CS-80V VCA 
 
In conclusion, here is a diagram that should help you to understand the composition of a 
basic sound: 
 
 
6.2 O
THER MODULES
  
 
6.2.1 The keyboard 
 
If we stop here, the sound that you will obtain will be uniform, without life and without 
an end !! The oscillator delivers a sound signal (the audio output of a waveform) of a 
fixed pitch in a continuous manner. In the diagram above, the only way to stop this 
quickly disagreeable sound is to lower the filter cut-off frequency so that it becomes 
more and more damp until it finally disappears; or simpler yet, lower the volume of the 
amplifier !  
 
 
To start and stop the sound, and this at the tone that we require, we use a keyboard 
that is connected to the oscillator. This will «play» the sound as soon as a key is 
pressed, and mute it when released. Of course, this connection is made through MIDI 
(it replaces the «gate» type of connections on analog synthesizers, which trigger the 
note when a key is pressed and stop it when released). On analog synthesizers, the 
key provides a gate which is often used to open and close the volume of the amplifier 
(gate). The key position provides a control voltage that tells the oscillator what pitch 
level to play when the gate opens.