Owners of McIntosh hardware featuring the DA1 digital audio module get an upgrade-- the DA2, a means to add audio-only HDMI Audio Return Channel (ARC) capability and multichannel audio support.
Supported multichannel formats include both Dolby and DTS, and they are converted to two-channel audio for playback through any DA2-equipped unit. The module is also compatible with CEC communications, allowing customers to control the power and volume of any connected McIntosh unit with a TV remote. The USB input supports native playback of up to DSD512 (plux DXD up to 384kHz), thanks to a quad-balanced 8-channel 32-bit DAC.