SSA - Surround Sound Analyzer

Specifications (Extract of the data sheet)

Display:   Graphical display indicating the single channel and total program loudness (Total Volume Indicator) acc. to selected weighting filters (e. g. SPL or Loudness)
     Position and width of phantom sound sources (PSI)
     Correlation of adjacent channels in PSI (color) resp. TVI (shape of line): red resp. funnel: negative range, yellow resp. straight line: "0" range, green resp. roof: positive range

  Separate correlators for the outer adjacent channels switchable: red: negative range, white: "0" range, green: positive range
     Dominance indicator (DMI)
     LFE Phase (warning display, if correlation between any channel and LFE is negative)