A voice is definition for a sound, created by a sequence of Stages. Voices are not directly played, rather they are formed into Notes.
A Note is an instance of a Voice, started at a specific point by a Trigger and shaped with a specific duration via a Sustain-Release (SR) envelope.
Stages are the components of Voices. They may be signal sources (e.g. Sine 262.0), filters (e.g. LowPass 500.0), or sinks (e.g. Channel left) or utility (e.g. Freq MiddleC)