I'm also hit by that same problem on Gentoo, with version 184.108.40.206.g3b776c9e. Like others, I'm using Alsa only.
I made sure to deactivate all my sound cards (with modprobe.d blacklist keyword) except the one I'm actually using, so Spotify couldn't choose the wrong one. Even with only one soundcard, it doesn't change anything.
Spotify output doesn't tell anything interesting except that it's using Alsa, as expected.
Also, I remember that in the past we were able to choose the output channel in the settings, and that's not the case anymore; why?
I have the same issue. I have spotify-220.127.116.11 installed, I'm running Arch Linux with kernel 4.2.3, and no sound with ALSA. Using Pulse Audio works just fine, I'd like to know if since latest versions Pulse Audio has become a required dependency. Thanks
In Xubuntu 15.04 AMD64 (Kernel 4.23) with pulse audio - spotify testing works very well - with web and cache contents; what does not work is player of local mp3, wma itp. (which without any problem I can listen to using VLC player)...