sfxVolume property
RxDouble
sfxVolume
final
User-chosen sfx volume multiplier (ENH-95) — persisted via
StorageKeys.sfxVolume. Multiplies every playSfx call's own volume
argument (that argument stays a per-call relative weight, e.g. a quieter
footstep vs. a louder explosion; this is the player's overall SFX mix).
Implementation
final RxDouble sfxVolume = _defaultSfxVolume.obs;