Toggles whether a source will use the reverberation engine.
Early / Cluster / Tail
Toggle whether a source will use only some or all of the different reverberation stages.
Early refers to Early Reflections stage of the Room response which is one of the most significant stages involved in our rapid aural perception of spatial properties and sound source localisation.
Cluster refers to a secondary iteration of room response reflections and is quite significant in the cognition of room acoustics.
Tail refers to the diffuse reverberations that eventually decay in a direct relationship with the size and reflectivity of an acoustic space. The tail section of a reverb dœs not contribute much to the localisability of a sound source in a space, but instead gives a sense of depth and ambience.