From BuzzWiki

A: This deserves a 2 part answer:

Overloader "Componented Wavetable System" adds support for 32bit .WAV files. These 32bit files can only be used by Buzz Generators (samplers and trackers) that support 32bit. At this time, the known plugins that support this are Fuzzpilz UnweidlyTracker and BTDSys Samplegrid 2, which both support 32bit .wav files. Further information for Developers: The Comp. Wavetable is plugin based (found in BuzzGearWTHelpers), it allows in 8-bit wavs (8bit loader), 16bit pcm wavs (gen wt handler), 24bit packed int wavs (gen wt handler), 32-bit pcm wavs (gen wt handler), 32-bit float wavs (gen wt handler), there is also a lpac loader which i never finished. If a developer wants to add Componented Wavetable support for additional formats (mp3, flac, whatever) to be used in a machine they are creating, they can do so by also writing an additional WTHelper plugin. You can find documentation for this in BuzzHelpOverloaderdevmanualsWTHelper.html, source code examples can be found in BuzzDevWTHelpers can also be written that will convert a format to another, so you could write a wthelper plugin to import a .ram file or whatever and convert it to 16bit 44.1 in the wavetable.

Another interesting note:

The bit depths themselves are only partially part of overloader, there is a wave entry flag that gets stored in the bmx (that is used with oskari's permission) to flag a sample as being "extended", which means the sample starts with 8 or so short ints (to keep it aligned to sound less harsh to trackers that dont know the new format), with the first short int (if i remember) that specifies the format as being either 16bit, 24bit or 32-bit.