I recently noticed the support for announcements in the playback and TTS but I am unsure which player beside Sonos supports the announcement?
Right now I have two players setup on my linux box both sharing alsa mix, mopidy for music and gmediarender (with DLNA) for announcements but I would prefer having a single server or somekind of solution to lower the music volume.
From looking at the mpd plugin source code, the annoucement is not supported there so this excludes mopidy and same for squeezelite. Anything beside Sonos?