There's a Subsonic app available on the Roku Channel Store (SubsonicTV LITE), but it doesn't work. Sign-in fails, and it can't even connect to the Subsonic demo server. Development appears to be inactive. There's a different open-source client in the form of Subsonic Channel (https://github.com/maihde/roku_subsonic), but it's inactive and isn't on the Channel Store. As a result, there's no support for Astiga on Roku platforms at the moment. I'd love to see this change.