Envelopes are used to control property values with a predefined shape. An envelope has an ADSR shape:
Envelopes can either be used in the context of MIDI or in the context of a normal playback.
When used in the context of MIDI, the envelope is configured for a sound to be played either on note-on or note-off. In the case of a sound to be played on note-on:
In the case of a sound to be played on note-off:
When used in the general context of a play sound:
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LFO and Envelope modulators' processing time depends on their RTPC usage. For most properties, a modulator is evaluated once per audio control frame. However, for the property Voice Volume, these modulators are evaluated at every audio sample frame. Use them selectively because they can consume a significant amount of a platform's memory and CPU.
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The RTPC cursors for LFO and Envelope modulators do not tell you their specific values at any point in time since they are determined by the modulator's internal properties.
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Using envelopes with MIDI objects
Envelopes can be used to control property values and also to control the life of sounds. Envelopes have the option of stopping the owner when the release is completed.
To add a Voice Volume envelope to an Actor-Mixer Hierarchy object (instrument):
In the Project Explorer, select an object in the Actor-Mixer Hierarchy.
In the Property Editor, go to the RTPC tab.
Click the [>>] button in the RTPC list.
From the selector menu, select Voice Volume.
Click the [>>] button for the X axis
From the selector menu, select Envelope > Default (Custom)
Click the […] button to edit the envelope
Edit the curve to set the range of modulation.
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