It appears that Subsonic distinguishes between folders containing media files in the root of the subfolder from folders containing no media files in the root of the subfolder (for example folders containing only subfolders).
The former (i.e., folders with a media file in the folders' roots) are considered "albums", whereas the latter (with no media files in the roots) are just "folders".
Thus, when browsing a folder in the media library, Subsonic displays first any "media files" in that folder, then it displays any "subfolders", and finally displays the "albums".
It gets more confusing when "Sort albums by year" is checked. In this case, the "albums" listed at the end of the results are listed in date order (as determined by Subsonic, which often is inaccurate, although a nice feature), with the "dated" albums listed first, then "undated" albums. This makes it extremely difficult to find desired content, especially when the listed folder contains many items.
So folder listings are ordered in the following ways:
Check "Sort albums by year":
- media files
- folders
- dated albums
- undated albums
Uncheck "Sort albums by year":
- media files
- folders
- albums
This conclusion is based on limited observations and may not accurately represent Subsonic's true operation.
Example media structure:
- Music -> Adele -> 21 -> {media files}
- Music -> Styx -> Best of Styx -> {media files}
- Music -> Styx -> Cornerstone (1979) -> {media files}
- Music -> Styx -> Discography -> {no media files, only subfolders}
- Music -> Styx -> {media files, including Lady}
- Music -> Yes -> Fragile -> {media files}
"Adele" is a folder, "21" is an album, "Styx" is an album, "Best of Styx" is an undated album, "Cornerstone" is a dated album, "Discography" is a folder, "Lady" is a media file, "Yes" is a folder, and "Fragile" is an album.
Browsing the "Music" folder would display as: Adele, Yes, Styx -- folder, folder, album.
If "Sort albums by year" is checked, browsing "Styx" would display as: Lady, Discography, Cornerstone, Best of Styx -- media file, folder, dated album, undated album.
If "Sort albums by year" is unchecked, browsing "Styx" would display as: Lady, Discography, Best of Styx, Cornerstone -- media file, folder, album, album.
As there is no delineation between the latter sections, having all items run together in this way (order) is confusing and unintuitive.
REQUEST:
Without the ability to re-sort listings, it would be great to display "Music", by default, as: Adele, Styx, Yes.
And it would be great to display Styx as: Best of Styx, Cornerstone, Discography, Lady -- or as: {media files, including Lady}, Best of Styx, Cornerstone, Discography.
In addition, it would be great to have a way for the user to control display order, either as a setting or by re-sorting each folder, or both (the setting being the default display method).