https://www.reasonstudios.com/shop/rack ... ion-meter/



“MetaCore” is an intuitive correlation meter which shows how much your signals are in-phase or out-of-phase.
The device not only detects out-of-phase signal problems but also gives phase manipulations options to help in fixing them. PAN and WIDTH controls are also included for further tweaking of your signal.
Correlation meter is one of the “must have” utilities for mastering, pinpointing issues with stereo or mono signals and helping in controlling and fixing “out of phase” problems.
Correlation value “+1” indicates that L/R channels correlate 100% (signals are in phase). Maximum correlation (identical signals).
Correlation values to the right of the center position (“-0.99”..”0”) indicate that the stereo signal is mono compatible.
Middle position “0” indicates the highest value of L/R divergence, which is audible as a wide stereo effect. No correlation between the signals.
If the Correlation meter moves to the left of the center position, out-of-phase material is being detected. This leads to phase cancelations (if the stereo signal is combined into a mono signal)
“-1” minimum correlation value indicates that L/R signals are completely out of phase.
The right half (from 0 to +1) is shaded green, the left-half (from -1 to 0) is shaded red.
If using a dual-mono signal just invert one channel’s polarity to make the signal “in-phase”.
PHASE INVERTOR MODES:
- NO (phase not inverted)
- LEFT (invert left channel phase)
- RIGHT (invert right channel phase)