#mixer

A custom sound-mixer slot with no baked pick and no fallback event resolves to null and plays nothing, with zero log lines anywhere. A fully wired audio call stack can be completely mute behind a clean console. When sound is missing and the console is silent, check whether the mix was actually baked for that slot before blaming the caller.

Engine 26.07.22 ships no .mixer resource type, so a project cannot author mixer buses as assets. Only Master, Default, and Voice exist, and the Mixer constructor is assembly-internal. Route category volume in code at play time through Sound.Play(string, Mixer) and SoundHandle.TargetMixer. Call Mixer.FindMixerByName first so the project picks up real buses if the engine ever ships authoring.