This tool inverts the phase of selected sample. Access the tool via keybinding (Sample editor - Process - Phase Invert) or sample editor context menu (Process -> Phase Invert).
Inversion can be done to a selected part of the sample, or the whole sample (no selection).
v1.1 - Made considerable speed optimization by decreasing the status bar update interval. It was hogging all the power... Also put in some additional status messages.
v1.2 - Corrected a bug which would cause an error when using tool on empty samples. (thanks, cocoa!)