Replace dc=example,dc=com with your LLDAP configured domain.
ldap://lldap:3890/ou=people,dc=example,dc=com
(&(uid={0})(memberof=cn=airsonic,ou=groups,dc=example,dc=com))
cn=admin,ou=people,dc=example,dc=com
admin-password
Make sure the box Automatically create users in Airsonic is checked.
Restart airsonic-advanced