Structure of what's called by build_soundbank tool:

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main (build_soundbank.cpp):

Check arguments Add search paths Init sheet_id.bin without sheet (NLMISC::CSheetId::initWithoutSheet()) UAudioMixer::buildSoundBank (audio_mixer_user.cpp)

UAudioMixer::buildSoundBank (audio_mixer_user.cpp):

Create new sound bank Load directory (CSoundBank::load / ) Return path to sounds.packed_sheets