SoundSend supports PCM stereo, Dolby Digital, Dolby Digital Plus, and Dolby Atmos with up to 8 channels of audio, through HDMI 2.0 and 2.1 using your TV's ARC/eARC. It also supports up to Dolby Digital over its optical input. There are many setups available with SoundSend that can create an amazing sound stage. (See Article Speaker Configurations)