Directional imaging is done in the imaging area between two
adjacent loudspeakers [2]. In the case of 3/2 stereophony, with
the help of surround channels the imaging area between the front
loudspeakers can be extended. Therefore possibilities are offered
for the reproduction of early lateral sound for imaging of spatial
depth as well as reverberation, in order to produce the spatial
impression and the envelopment. Details are described in [3].