The acceptable blocksize of WavPack is from 1 to 131072 and I think most people would like to use the "default" blocksize.
But when I set the blocksize to very small value such as 1, I got a huge WaPpack file, the filesize is about 25 times of the original WAV file. Wavpack seems not to be an audio compressor but "inflator".
Personally, I think the minimium acceptable blocksize should be set to 256 or so, too small blocksize is meaningless.

Yeah, you're right, very small block size are not useful in WavPack. However, with the new "merge-blocks" option, blocks down to about 32 samples make some sense. I may put a more reasonable lower limit on the range for that option, or I might have the code prevent the average blocksize from falling below a certain limit (this already exists for the --dns option).

Thanks for pointing this out. I don't want people generating these huge files (and they might not even play in some cases)...