I have an album from the Smashing Pumpkins, Mellon Collie and the Infinite Sadness. It’s a double album, disc 1 is titled Dawn to Dusk, and disc 2 is titled Twilight to Starlight. However, iTunes does not treat subtitles separately from the actual title, and sees these as two separate albums. I checked the ID3 spec, and 2.3.0 does not have an option for subtitles. 2.4.0 does, it’s called TSST and the description is:
The ‘Set subtitle’ frame is intended for the subtitle of the part of
a set this track belongs to.
The “set” they refer to is actually their term for which disc (it can mean other things, but disc number from a multi-disc set is what I’m talking about). It seems there’s a “Grouping” field in iTunes that might be used for this, but after reading What is iTunes grouping column for?, it appears this is incorrect:
grouping (Unicode text) : the grouping (piece) of the track. Generally used to denote movements within a classical work.
Which is not what lifehacker thinks it is, it’s actually TIT3 as described by the earlier versions of the spec:
The ‘Subtitle/Description refinement’ frame is used for information
directly related to the contents title (e.g. “Op. 16″ or “Performed
live at Wembley”).
However, after checking in ID3 Editor from Pa-software, the text put into grouping is actually TIT1, as it’s in the Content field, described by the help documentation as
Content:
The ‘Content group description’ frame is used if the sound belongs to a larger category of sounds/music. For example, classical music is often sorted in different musical sections (e.g. “Piano Concerto”, “Weather – Hurricane”).
Which is the exact description, verbatim, for TIT1. The description in ID3 Editor for subtitle is the same as TIT3.
VLC itself is confused as hell by all this, as it just shows hexadecimal bytecode in the Description field, and I don’t know what it’s trying to show there. In fact, VLC shows very little data.
Interesting tidbit: neither ID3 Editor nor VLC show artwork for the mp3s, but iTunes and the Finder do. My guess is iTunes is storing it oddly.
Also, ID3 v2.4 is 8 years old, with the most recent edit made five years ago in 2003. It’s apparently not widely adopted because there are disagreements with some of the revisions, I don’t know why these disagreements exist nor what they are. I think TSST is a worthy addition, perhaps backported to ID3 v2.3.1 (a not-yet-existing standard).
I’m working on a ID3 page for VideoLAN, if you’re interested in helping.