DirectSpeakers For channel-based audio, where each channel feeds a speaker directly First version within the Dwerft project 2019 1 Matrix For channel-based audio where channels are matrixed together, such as Mid-Side, Lt/Rt First version within the Dwerft project 2019 1 Objects For object-based audio where channels represent audio objects (or parts of objects), so include positional information First version within the Dwerft project 2019 1 HOA For scene-based audio where Ambisonics and HOA are used First version within the Dwerft project 2019 1 Binaural For binaural audio, where playback is over headphones First version within the Dwerft project 2019 1 User Custom For user custom types. First version within the Dwerft project 2019 1