As outlined by the table below
since
the word ``speaker'' is overloaded,
meaning both ``loudspeaker'' and ``talker,''
we use ``source'' to mean both,
a logical sound emitter.
Similarly and symmetrically,
``sink'' is used to describe a logical sound receptor,
a delegate of a human listener in a virtual room.
The number of source -> sink directionalizations is determined by the number of mixels,
acronymic for sound mixing elements,
in analogy to
pixels,
taxels (tactile arrays),
and voxels (a.k.a. boxels),
since they form the raster across which
a soundscape is projected,
and define the granularity of control
and degree of spatial polyphony.
