Itsy features independent left and right channel phase inversion switches and a corresponding correlation (phase) meter for checking the phase of your stereo signal. At +1 both L+R are in-phase, and means you have a mono signal; at -1 the signal is entirely out-of-phase. Stereo signals will typically be between -0.5 and +0.5. The phase controls can be applied to the stereo inverter, or the phase section can be split from the stereo inverter and used on a second signal instead.
Stereo Inverter
Phase Inverter
Correlation (phase) meter
Please note for that reasons out of our control, Itsy is listed under “Effects”, not “Utilities”, in the Reason device manager.