Low values like +01 will produce a very slow rise & high values will produce a quick rise to full intensity. When this parameter has a
-ve value, during the “Sustain” phase of the envelope the Sustain value will fall to zero at a “Rate” determined by this parameter as
can be seen below:
Low values like -01 will produce a very slow fall & high values will produce a quick fall to zero intensity.
A-D Repeat allows the Attack & Decay phases of the envelope to be looped, producing repeated cycles of Attack & Decay curves.
This is fully adjustable from Off ( normal ADSR operation ) to 126 repeats & Infinity.
Sustain Time which is used to control how long the “Sustain” phase of the envelope will last. When this parameter is set to 127 (
infinite ) the curve is normal like so:
When this parameter is set to anything less than 127 the “Sustain” phase has a defined time duration & can be adjusted from very
long to very short, so that the “Sustain” phase may end before the key played is released at which point the “Release” phase will
start automatically. Below is an example of all 3 new parameters working together:
Summary
An Analogue Synthesiser can be broken down into three main elements.
1 - The Oscillator is the part of a synthesiser that generates “Waveforms” at a certain “Pitch”.
2 - The type of “Waveform” selected in the Oscillator & the settings of the “Filter” determine the “Tone” of the sound.
3 - The sound is then passed through an “Amplifier” which is controlled by an “Envelope Generator”. These alter the “Volume” of a
sound over time.
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