Open the Package Center and install the package.

• modify access rights for squeezeboxserver user (do this on the server where the music files physically reside)

chown -R <user>:<musicgroup> /music # or
chgrp -R <musicgroup> /music # faster

1. If you want to access the music directory and contents from different machines or VMs, choose users (gid=100) as <musicgroup>, then add user squeezeboxserver to users. This is also the group you can access the music directories from Media Server Installation - Synology DSM 4.3 (Oberon)
2. New music files from a Windows client will be written to the server with 755 directory and 644 file permissions
3. To make the music directory accessible for the client, either leave the 644 file permissions or change group to <musicgroup> and change 750 directory and 640 file permissions
4. You can use the following commands to do this throughout the music tree:

find /path/to/music/dir -type d -exec chmod 750 {} + # directories
find /path/to/music/dir -type f -exec chmod 640 {} + # files