https://bugs.winehq.org/show_bug.cgi?id=42414
--- Comment #13 from Sebastian Lackner sebastian@fds-team.de --- (In reply to Andrew Eikum from comment #12)
This won't work correctly. I think it's better to correctly report that we don't support this format, than to pretend IEEE float audio is actually PCM.
Michael suggested this patch, and based on the information he found they are float formats. See http://openal.org/pipermail/openal/2014-December/000287.html for example.