MrxSoundCategories
Byte-for-byte identical to resident/MrxSoundCategories — see that page for full documentation of its functions, inheritance, and events.
In the shell context
Category fade/pitch ducking tables (Fade/Pitch, keyed by mode strings like "actionhijack"/ "survivalmode"/"satelliteview"), configured both here (_AdditionalFadeSetup, credits ducking) and from the shell-only MrxSoundShellBootstrap.Init() (which registers the vosequence/actionhijack/ survivalmode/fanfare/satelliteview entries). MrxSound.lua’s BeginActionHijack/BeginSurvivalMode/ etc. call into this same table regardless of which tree the call originates from.