had the same problem as MrMoeK. Turns out Pulsaudio was not running due to a error in /etc/pulse/daemon.conf (new and updated install of m2p_rpi3_7zoll_232.img on raspi3). There were 2 “/n” at the end of the file instead of simple newlines. Corrected this, started Pulsaudio and was able to connect to my speakers right away!
Maybe a dev could look into that.