Loading Super Hi Rez audio files to subsonic playlist

Yesterday I got the Oppo 103D and connected it to my computer (WIN 7) by wifi in my home network. I am using Subsonic in the trial period to see if it is an adequate DLNA for these large Super Hi Rez 24bit/192kHz audio files.
The good news is that the Oppo sees Subsonic on the network screen. The bad news is that I do not for the life of me know how to transfer my downloaded music to a subsonic playlist. The original Hi Rez files are placed automatically at download to a special folder which goes directly from the source to a special subfolder of my general music folder "My Music". Let me know if you need more. Hope you can help.
The good news is that the Oppo sees Subsonic on the network screen. The bad news is that I do not for the life of me know how to transfer my downloaded music to a subsonic playlist. The original Hi Rez files are placed automatically at download to a special folder which goes directly from the source to a special subfolder of my general music folder "My Music". Let me know if you need more. Hope you can help.