ID3 태그 V1.0은 mp3데이터의 가장 마지막에 위치하고 있기 때문에 스트리밍 서비스에서 이용하기엔 적합하지 않습니다.
하지만 V2.0의 ID3 태그는 mp3 데이터 앞부분에 위치하고 있으니 대략 좆타~ 라고 역시 레퍼런스에 씌여 있더군요.

MP3 audio files are able to contain an abundance of metadata
about the sound. This is most often used in music files to record the name of
the song, the artist, album, genre, year of release, composer, etc. How much
information is actually included in these tags depends on who encoded or tagged
the file. In most cases though, you’ll at least be able to get at the
songname and artist tag.

This data is available to you in ActionScript through the
id3 property of a Sound object.

This property is an instance of the flash.media.ID3Info class, which
contains the following properties:

• album

• artist

• comment

• genre

• songName

• TRack

• year

So, to read the song’s name, you would access it as
follows:

_sound.id3.songName