X-Phase is an all-pass filter plug-in designed to provide precise manual phase control with high-quality audio response. It allows users to apply a phase shift at a specific frequency within a signal without altering the gain, making it ideal for resolving phase issues commonly encountered when using multiple microphones during recording. This capability ensures cleaner mixes by correcting phase offsets, particularly useful for overhead microphones combined with close mics.

Beyond phase correction, X-Phase can create comb filter effects by blending a filtered signal with its unfiltered counterpart. The plug-in features straightforward controls including a frequency selector to target the phase shift, a Q control to adjust the slope of the phase correction curve, and a phase invert button that flips the phase by 180 degrees. These tools give users intuitive yet powerful control over the signal's phase characteristics.

X-Phase also incorporates a delay section for broader time alignment, with adjustable delay settings displayed in various units such as seconds, milliseconds, samples, meters, or feet. Users can apply adjustments to the left, right, or both channels, and the plug-in supports full automation within digital audio workstations. Additional features include input and output meters, level controls, and an A/B preset switch for easy comparison between different settings, making X-Phase a flexible and essential tool for phase management and signal alignment.