I'm analyzing the unpack data from the PazuDora X (Puzzle & Dragons).
https://fileinfo.com/extension/acb << The solution is from here.
You can use VGMToolbox to unpack the ACB file. And then use YATA+ convert *.bcwav to *.wav
But I don't know how to repack bcwav to *.acb, bacause CRIWARE is...