I am looking for documentation on the new Audio Mixer system.

We are seeing many new functions and settings based on the Audio Mixer system but cannot find any documentation on these features. Can you please point me to any information that is available?

LowAudioQualitySettings=(DisableReverb=true, DisableEQ=true, DisableHRTF=false, DisableParallelSourceProcessing=true, ChannelCount=24)
HighAudioQualitySettings=(DisableReverb=false, DisableEQ=false, DisableHRTF=false, DisableParallelSourceProcessing=false, ChannelCount=32)