Furthermore, sustain is the third of the four segments in an ADSR envelope. The sustain portion of the ADSR envelope begins when the attack and decay portions have run their course, and continues until the key is released. The sustain control is used to determine the level at which the envelope will remain. While the attack, decay, and release controls are rate or time controls, the sustain control is a level control.
The sustain pedal is the electronic equivalent of a piano's damper pedal. In most synthesizers, the sustain pedal latches the envelopes of any currently playing or subsequently played notes at their sustain levels, even if the keys are lifted.
There are many factors that affect the level of sustain in guitars. The most obvious ones are the craft work and the quality of the wood and other material.
Patent Issued for Plasma Display Apparatus Including an Address Electrode Being Electrically Floated in a Sustain Period
Sep 12, 2012; From Alexandria, Virginia, VerticalNews journalists report that a patent by the inventors Soh, Sangyoon (Gumi, KR); Kim, Mukhee...