Playback but no sound

Hi, I installed mopidy via APT on Linux Mint 18.3. I adaped /etc/mopidy/mopidy.conf and scanned my library successfully via mopidyctl. I connnect using MPdroid and can browse the artists and start playback. Unfortunately there is no sound but no errors at the logs.

cache_dir = /var/cache/mopidy
config_dir = /etc/mopidy
data_dir = /var/lib/mopidy

config_file = /etc/mopidy/logging.conf
debug_file = /var/log/mopidy/mopidy-debug.log


mixer = alsamixer

mixer_volume = 75

output = pulsesink

media_dir = /mnt//MP3z

playlists_dir = /var/lib/mopidy/playlists

enabled = true
password = ***
hostname = ::

As you can see, I tried to set to ALSA and OSS mixer / sinks manually, but this didn’t solved the problem. Instead mopidy refused to even start the playback and fired some errors.

Had success by setting up pulseaudio