v2 tags

   4.19  BUF Recommended buffer size

   4.17  CNT Play counter
   4.11  COM Comments
   4.21  CRA Audio encryption
   4.20  CRM Encrypted meta frame

   4.6   ETC Event timing codes
   4.13  EQU Equalization

   4.16  GEO General encapsulated object

   4.4   IPL Involved people list

   4.22  LNK Linked information

   4.5   MCI Music CD Identifier
   4.7   MLL MPEG location lookup table

   4.15  PIC Attached picture
   4.18  POP Popularimeter

   4.14  REV Reverb
   4.12  RVA Relative volume adjustment

   4.10  SLT Synchronized lyric/text
   4.8   STC Synced tempo codes

   4.2.1 TAL Album/Movie/Show title
   4.2.1 TBP BPM (Beats Per Minute)
   4.2.1 TCM Composer
   4.2.1 TCO Content type
   4.2.1 TCR Copyright message
   4.2.1 TDA Date
   4.2.1 TDY Playlist delay
   4.2.1 TEN Encoded by
   4.2.1 TFT File type
   4.2.1 TIM Time
   4.2.1 TKE Initial key
   4.2.1 TLA Language(s)
   4.2.1 TLE Length
   4.2.1 TMT Media type
   4.2.1 TOA Original artist(s)/performer(s)
   4.2.1 TOF Original filename
   4.2.1 TOL Original Lyricist(s)/text writer(s)
   4.2.1 TOR Original release year
   4.2.1 TOT Original album/Movie/Show title
   4.2.1 TP1 Lead artist(s)/Lead performer(s)/Soloist(s)/Performing group
   4.2.1 TP2 Band/Orchestra/Accompaniment
   4.2.1 TP3 Conductor/Performer refinement
   4.2.1 TP4 Interpreted, remixed, or otherwise modified by
   4.2.1 TPA Part of a set
   4.2.1 TPB Publisher
   4.2.1 TRC ISRC (International Standard Recording Code)
   4.2.1 TRD Recording dates
   4.2.1 TRK Track number/Position in set
   4.2.1 TSI Size
   4.2.1 TSS Software/hardware and settings used for encoding
   4.2.1 TT1 Content group description
   4.2.1 TT2 Title/Songname/Content description
   4.2.1 TT3 Subtitle/Description refinement
   4.2.1 TXT Lyricist/text writer
   4.2.2 TXX User defined text information frame
   4.2.1 TYE Year

   4.1   UFI Unique file identifier
   4.9   ULT Unsychronized lyric/text transcription

   4.3.1 WAF Official audio file webpage
   4.3.1 WAR Official artist/performer webpage
   4.3.1 WAS Official audio source webpage
   4.3.1 WCM Commercial information
   4.3.1 WCP Copyright/Legal information
   4.3.1 WPB Publishers official webpage
   4.3.2 WXX User defined URL link frame