SPL Mapping can be enabled and disabled from the SPL Toggle control in the top-right of the 3D View. The 3D View displays multi-layer mapping, meaning all frequency bands are calculated at once. Selecting a different bandwidth to view will not require recalculation.
To change the mapped bandwidth, use the drop-down boxes next to the SPL Toggle. To change the Colour Map, open the Application Settings.
At present there is no amplifier integration within System Optimiser, so the SPL scale does not display the absolute maximum sound pressure attainable. Instead it displays the 1 Watt at 1 Metre data, which is still useful for relative mapping.
A highly complex acoustical model is utilised for pressure mapping. Its details can be found in the Background to the Application section.