Cableguys has posted a video that shows how you can use its multiband VolumeShaper 5 audio effect plugin to remove a hi-hat from a loop.
In the video, a preset wave shape is used to isolate the hi-hat, then the curve is precisely fine-tuned to focus tightly on the hat. The curve is then flipped upside down, so everything *except* the hi-hat is now audible.
The multiband and mix features are used to blend the low-end groove back in, and set the overall hi-hat level respectively. With the hi-hat removed completely, it’s easy to add a new hi-hat to the beat, to create your own custom groove.
VolumeShaper 5 is available for Windows and Mac (VST/AU) for 29 EUR/$34 USD. It is also parts of the ShaperBox Bundle and Cableguys Bundle.