Note there are audio sample examples at the product site:
https://www.sepsonix.com/Loaded the "West End Girls" clip in Audacity. No extreme clipping, and there is still moderate dynamic range present. IOW generally stable but not brickwalled to oblivion like how many commercial FM broadcast processors are configured.
I am a big fan of StereoTool unless really wanting a standalone audio processor. About $300 for a basic FM package without some of the more advanced options, though one does have to add a moderate-spec host PC and preferably a decent sound card if doing on-air broadcasting.