BCWAV

BCWAV Are sound files used in Persona Q and Persona Q2, Commonly used in 3DS titles

Looping Audio Converter
This specific release of Looping Audio converter adds BCWAV support, You can download it here

Configuration
You must change the Output format to BCWAV, For files with no loop information to Keep as non-looping and For files with more than one audio channel to Put all channels into one file