The Left figure shows a classic L‑Acoustics “stereo” line-array system modeled in Soundvision software. This example has the typical pros and cons of a stereo design, including standard L/R mix and high-impact for the center areas only; note that over ½ of the venue seating area is show in yellow, because much of this large seating area has coverage from only one channel-array. Light green area is the stereo sweet spot, (dual mono signals not as problematic in this zone). Dark green area, stereo signals still look good, but dual mono signals are greatly degraded. Both of the coverage (heat) maps are from the Santa Barbara Bowl concert sound design options, by L‑Acoustics, for Bon Iver Aug. 8th 20018.
The Right figure shows a L‑Acoustics L-ISA Hyperreal (immersive) 7.1 sound system design in Soundvision. The Highlighted green area is the shared coverage region from the 7 arrays of the Hyperreal sound system design; meaning an object mixed anywhere in the system will be heard at a similar level to any other object at any other position in the system. This is calculated based on the loudspeaker position, acoustic parameters of the given speaker and electronic settings in the particular design. The Unshared region in yellow is the audience coverage area that is missing coverage from at least 1 array of the L-ISA Hyperreal sound design and will need some fill speakers to properly produce the mix for the audience. In this particular design the dark green in the coverage map represents an area where the time alignment between different speakers will be a problem for listeners.