From the FAQ: "Any list (folder, user playlist, album, artist, etc.) can be played with following modes". The etc. is sort of vague. Is everything on the Library screen a list?
It might be faster just to use an example. If my library contains 2 albums by Foo called A-Foo and Z-Foo in a folder called Foo-stuff, and 1 album by Bar called B-Bar in a folder called Bar-stuff, plus a Poweramp playlist called ALL containing all 3 albums, how many "lists" is that?
If I choose shuffle mode "Lists (aka Shuffle Lists, Songs in Order)", what will be played?
If I understand this correctly, Poweramp will randomly choose one of six "lists" -- Folders, All Songs, Albums, Artists, Genres, and Playlists -- play it according to the logic below, then move on to another of the six.
(Folders) go through each folder alphabetically (Bar-stuff then Foo-stuff), and play everything it in alphabetical order by filename;
(All Songs) play all songs from all 3 albums in alphabetical order;
(Albums) play the albums in alphabetical order (A-Foo then B-Bar then Z-Foo), with songs in track order;
(Artists) play all songs by Bar in alphabetical order, then all songs by Foo in alphabetical order;
(Genres) take first genre alphabetically and play all songs in it in alphabetical order, then next genre, etc.
(Playlists) play the ALL playlist in alphabetical order.
Meaning that if you choose "Lists (aka Shuffle Lists, Songs in Order)" on my example, it will eventually play each song 6 times.
Also, is "Queue" a list? Are "Top Rated" or "Recently Added"?