[hansjorg]

You can use an MPD terminal client with Mopidy [1] (an MPD server). There are also graphical clients for both desktop and mobile. [2]

Mopidy supports local files, Spotify, Soundcloud and Google Play Music, all mixed in the same playlists.

1: http://www.mopidy.com/

2: http://mpd.wikia.com/wiki/Clients

[adamcik]

Note that there is also Soundcloud support for mopidy, among other extensions:

http://docs.mopidy.com/en/latest/ext/external/#mopidy-soundc...