Quadra & Expander Manual
Patch Examples
Patch 1: Basic Voice With ASR Envelopes
This is a simple patch that uses the Quadra as two ASR envelope generators for a basic
synthesizer voice. The reason ASR is chosen over AD in this example is because ASR will
sustain as long as the keyboard key is held down. This is because an ASR envelope has a
sustain section that stays high as long as the input gate is high. Once the keyboard key is
released and the input gate goes low, the envelope will move into its decay phase, which in
ASR mode is referred to as release. ASR stands for Attack, Sustain, Release.
Page 14
