I start to upgrade whatever 32bit wv I find because flac doesn't support 32bit. Is there software to crop wv files without re-encoding? The only solution close to this is to crop the file with audacity, export to wav, and then convert to wv. (using the best options available). Audacity can export directly to wv but the depth drops to 16bit... (as far as I know...)
Audacity should be able to export to pretty much anything and any bit depth, seeing how it supports ffmpeg and other command line encoders with custom commands. I've never used it for that purpose, but if ffmpeg and/or the Wavpack executable support it, it should work.
I quite doubt there is software that can edit Wavpack directly without re-encoding. I don't even know one for FLAC, which is a more popular format.
And there is literally zero point to editing without reencoding lossless formats, as the only generational loss will be your crop and edit actions, not the compression and decoding.
If you mean cropping to time, I've tested avconv, and it handles WavPack to nearest block without reencoding using "-c copy", -ss and -t switches.