Correlation Meter (giving you information about the the mono compatibility of a stereo and a Surround signal) you also can make easily Phase Check with this tool...
Displaying in 1/3, 1/6, 1/12, 1/24 Octave frequency displayinge and FFT (2048 Bands......
:: New features to this program include
# K-System (K-20, K-14, K-12) by Bob Katz
# Level Meter norm > DIN45406
# Level Meter norm > Nordic N9
# Level Meter norm > BBC PPM
# Level Meter norm > EBU PPM
# Integration time from none up to 300ms
#......