Can't find Playlists folder to help me stream with Subsonic.

Question

HI there. 
I’m runnun iTunes 11 on OS 10.8.4.
I’ve used iTunes constantly for many years and do tons of library organization, have made hundreds of playlists, have a massive library with relatively few problems (in recent years at least) and use home sharing to stream to Apple TV, controlled with iPhone and iPad. 
I want to use Subsonic for long distance streaming, and setting it up to find the music files was no problem, they are on an external drive, the the rest should be on my main drive.   But I’ll be dang - diddley - anged if i can find the folder containing my playlists.
Subsonic’s default suggested path is /Users/Shared/Playlists.   (Shouldn’t it say iTunes in there somewhere?)  My Users/Shared folder has folders for other app’s like Adobe, but nothing for iTunes or Playlists.
Under my own Username there is Music, and iTunes within that, but here’s where it gets weird and messy. The only folder with a promising name within, iTunes Playlists, contains only about a dozen xml files of specific playlists I exported to use with a label maker, and co-responding folder called Playlist Acoustica Labels, with a handful of similarly named files.
Searching in Finder, the only folders with Playlists in the name are within the location: Username/Music/beaTunes/   Besides a few that were obviously custom named by me within BeaTunes,  there is one called iTunes Library (biglong#insidebrackets), and another simply called Playlists.   This final folder has a copy of what looks something like my libraries playlists, but from 2 years ago, when I last even tried to really use BeaTunes; the playlist .m3u8 files are all dated as last modified in 2011, with folders and playlists I’ve since deleted, and nothing new created since then.  (The only files that are updated for this morning are de-highlted .DS_Store files, whatever the heck those are.)   
By the way, the reason I stopped trying to use BeaTunes was it never worked for me, not once.  After taking like, seriously, hours to load my library, I had it generate a custom list based on a sample track, and it produced other tracks from the same album.  That was $40 or however much well spent.  Anyone with a  huge library ever have any luck with it?  What a waste. 
Anyway, those are seriously the only folders I can find anywhere called Playlists.   I’ve been surfing Apple Support Pages and various forums for answers, and nothing is clearing anything up.  (Of course there is the red herring hits from people referring to the Playlist Folders *inside iTunes you create to group actual playlists,*  but nothing else than similar dead ends regarding system folders with playlist files. 
Some of the typically mystifying Apple genius/whatever pages seem to be directing me towards a file within iTunes Media called iTunes Music Library.xml (and with Backup in the name just before .xml, and some other variations of old versions of the same.   The doc’s and some posters seem to indicate that these contain all the iTunes metadata.  I tried directing Subsonic to this file, and to the folder containing it, but nothing ever changes; Subsonic’s Home Screen always shows all my artists, but nothing under Playlists. 
I saw something about another file called iTunes Libary.itl as a companion to .xml, and I tried that one too nothing.  The iTunes Media > iTunes file I’ve found much of this in DID, by the way, have what looked like all of the apps that I’ve bought, probably all my iPhone Voice Notes, and a group of E-music mp3’s I downloaded when my external drive hook up was not working, redirecting my library to the Main HD before I switched it back and copied all those files to the correct music location..  So the evidence say this iTunes location is running the  media on the external drive, and can’t find anything for iTunes on the external except for the music files.
I’m just stumped.  I wish there was a way to right click a playlist name, like you can a song in iTunes, and select “Show file in Finder.”  But I tried it, right clicking does nothing.  So I’m out of ideas. 
Oh yeah, I also have an app running that makes invisible files visible.  That didn’t help either.  Man I’m just out of ideas here.  Something so simple, but then I’ve seen Mac complicate simple things before with no warning or disregard, so I’m hoping someone knows something to help me find where these things live.  This thing has devoured my Sunday morning. 
Any and all help and assistance is greatly appreciated.  Thanks all.
Best,
Brian

Answer 1

Dear Brian:
Create a Play List in iTunes.
Control-Click and open "Export" in the highlighted Playlist in iTunes.
With "Export" opened:
1. Click on "Format" and choose "M3U";
2. In "Save As" name your "WhatEverNamePlaylist.m3u"; and
3. In "Where" tell the program where to send your "WhatEverNamePlaylist.m3u".
You are done creating the Playlist.m3u in iTunes.
Open "Subsonic Web Page".
Left hand column open "Import playlist".
In "Import playlist" click "Choose File" and open the "WhatEverNamePlaylist.m3u"; you created in iTunes.
The "WhatEverNamePlaylist.m3u" should now occupy the space between "Choose File" and "OK".
Click "OK".
The file should now be in the "Playlist" on the left.