I've been trying to figure this out for a few hours now. I'm hoping someone can help. Essentially I cannot see any of my mp3 files within the "Playing, Starred, Playlists" sections. I can only view them down the left hand side.
My user has all the privileges activated and access to the music folder (/home/subsonic/music/). The permissions are set up correctly and this can be verified by the fact I can play and see the music down the left hand side (Please refer to screenshot below). I've checked the log file (/var/subsonic/subsonic_sh.log) and I haven't found any errors on startup or when I visit the categories "Playing, Starred, Playlists". I've seen other screenshots of Subsonic and it would appear users are normally able to create folders within the left hand section also. Do I not have this option due to a limitation of Centos version? Sorry if I am missing something very simple.
Server Info:
Distro: Centos 7
Version 5.2.1 (build 4428) – March 4, 2015
Server jetty-6.1.x, java 1.7.0_85, Linux (153.8 MB / 304.0 MB)

[root@cc subsonic]# ps aux | grep subsonic
subsonic 7631 59.0 0.6 2728512 100668 ? Sl 06:23 0:01 java -Xmx1024m -Dsubsonic.home=/var/subsonic -Dsubsonic.host=0.0.0.0 - subsonic.port=4040 -Dsubsonic.httpsPort=0 -Dsubsonic.contextPath=/ -Dsubsonic.defaultMusicFolder=/home/subsonic/music/ -Dsubsonic.defaultPodcastFolder=/home/subsonic/podcasts/ -Dsubsonic.defaultPlaylistFolder=/home/subsonic/playlists/ -Djava.awt.headless=true -verbose:gc -jar subsonic-booter-jar-with-dependencies.jar
EDIT (05:40):
I can actually "Star" songs and then they are visible under the "Star" section (duh). This is the only way I can get the mobile app to find any music on my server but at least that works so I can listen on the drive home!

EDIT (10/8/2015 6:00):
OK I've figured it out. I am pretty stupid, I hadn't realised you were supposed to create folders within the media folder (/home/subsonic/music/FOLDER). Once I did this I was able to view all my songs and add them to playlists etc. Sorry for the trouble! Great software btw!
Thanks.