I've been using UAPP for several days now, and WOW! What a fantastic app! I won't extoll it's virtues here, as others have already done so more eloquently than I am able. I would like to address the only real issue I've had, which has been mentioned previously in this thread. I love it that we can stream our FLAC (or whichever) files from our PCs and servers to UAPP, and that it is really pretty simple to set up the Samba share from within the app, but if you don't know Samba from Simba then it can really be quite a bear (lion?) to accomplish the task. So here in a nutshell is how to do it.
The "Network share" page from within UAPP asks for four things: "Name:", "Address (URL):", "User name:", and "Password:". Simple enough, and here's what it wants.
Name: This is an arbitrary name that you assign for your own identification. You can call it what ever you want, as long as you don't use illegal characters (I assume). I have no idea what those characters are so explore at your own peril.
Address(URL): smb:// You will want to append your computer's name directly after the double forward slash. In Windows 8.1, if you select "User Accounts" and then "Configure advanced user profile properties", a small window will open named "User Profiles". It lists profiles stored on the computer. I have only one, but if you have more I would imagine that you'd want to select the one that you'll be logged on to when streaming from the PC. The name is listed as [computer name]\[user name], where [computer name] may be something like "Jims-computer" or "Dell-PC", or whatever you or the computer manufacturer have named your machine. Simply type the computer's name in right after the smb:// , without any spaces. For instance, it would look something like smb://jims-computer I don't know if capital letters are OK, but I just used lower-case.
User Name: The user name is the [user name] field from the above step. Again, no spaces and I had used lower-case.
Password: This is the password you use to sign on to your computer. If you don't have one then you may have to create one; I don't know. I do use a password, the same one that I log in with and that Microsoft uses for logging on to their system at start-up.
That's it! Good luck and enjoy all of those wonderful music files you have stored on your PC.