Secondarily, the keyboard's pitch is also used to modulate other sources, such as filter cutoff.
If you do not use a MIDI keyboard, you can also play on the virtual keyboard of the
8.2.2 The envelope generator or ADSR
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 control this sound is to lower the filter
The envelope generator, connected to the VCA, is used to «sculpt» the volume of the sound when we press a key on the keyboard and ends after the note is released.
The most common modules developed use 4 settings that we can vary:
•The Attack is the time that the sound will take to reach its maximum volume once we have pressed a key on the keyboard.
•The Decay is the time that the sound will take to diminish after the attack portion is complete.
•The Sustain is the maximum volume level that the sound will reach after the decay is complete.
•The Release is the time that the sound will take to diminish once the key has been released.
The ADSR Envelope
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