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Chapter 5. Building a Song > Using Envelopes

Using Envelopes

The SubTractor's amp envelope and filter envelope faders regulate how the tones behave over time. Instead of playing steady tones, the envelopes allow the oscillators to mimic many of the sound variations of real-life instruments—such as louds and softs, and bright and dark tonal variations.

The primary envelope is the amp envelope, which varies louds and softs (amplitude) from the time a note is struck until it gets released. Each time a note is played, the amp envelope opens and closes a gate in four stages: attack, decay, sustain, and release—commonly referred to as ADSR (Figure 5.33).


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