HI, As far as I know Roon are working to provide OpenHome support for the DS (so you can use Songcast) to stream to you DS. Roon have a pile of Linn hardware in their labs and are frantically working to get it finished (There are some issues with some Linn provided code - or so I’ve been lead to believe). In the short term you can use the Linn Airplay support - but you’ll only get CD quality (this is a limit of the Airplay protocol nothing to do with Linn or Roon).
Rik