A DefineSound tag declares a set of samples of a sound effect or a music.
The sound samples can be compressed or not, stereo or not and 8 or 16 bits. The different modes are not all available in version 2, although the same tag is used in newer versions with additional capabilities.
The f_sound_is_16bits is always set to 1 (16bits samples) if the samples are compressed (neither Raw
nor Uncompressed
).