I have a Sonos Amp with two passive speakers and two Sonos Ones setup in surround mode. I use a Mac Mini and an AppleTV to play content, they are connected via HDMI to the TV, which passes on an optical signal to the Amp via the Sonos adapter.
One of the things I was most excited to try out with this setup was multichannel audio. I am very pleased with the results, and am looking forward to a lot of amazing listening.
I have been able to playback multichannel audio in two ways, either converting my flac files to AC3 with ffmpeg and playing them via Kodi set to to passthrough, or activating AC3 transcoding in Kodi and playing flac directly.
I also use Plex and Infuse, but was not able to get them to either passthrough or transcode.
Can anyone recommend any other player, or other solution to play multichannel music with the Amp running either on OS X or AppleTV?