$ fq -d id3v2 dv txxx-nonullterm
    |00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|0123456789abcdef|.{}: txxx-nonullterm (id3v2) 0x0-0x27 (39)
    |                                               |                |  header{}: 0x0-0xa (10)
0x00|49 44 33                                       |ID3             |    magic: "ID3" (valid) 0x0-0x3 (3)
0x00|         03                                    |   .            |    version: 3 (valid) 0x3-0x4 (1)
0x00|            00                                 |    .           |    revision: 0 0x4-0x5 (1)
    |                                               |                |    flags{}: 0x5-0x6 (1)
0x00|               00                              |     .          |      unsynchronisation: false 0x5-0x5.1 (0.1)
0x00|               00                              |     .          |      extended_header: false 0x5.1-0x5.2 (0.1)
0x00|               00                              |     .          |      experimental_indicator: false 0x5.2-0x5.3 (0.1)
0x00|               00                              |     .          |      unused: 0 0x5.3-0x6 (0.5)
0x00|                  00 00 00 1d                  |      ....      |    size: 29 0x6-0xa (4)
    |                                               |                |  frames[0:1]: 0xa-0x27 (29)
    |                                               |                |    [0]{}: frame 0xa-0x27 (29)
0x00|                              54 58 58 58      |          TXXX  |      id: "TXXX" (User defined text information frame) 0xa-0xe (4)
0x00|                                          00 00|              ..|      size: 19 0xe-0x12 (4)
0x10|00 13                                          |..              |
    |                                               |                |      flags{}: 0x12-0x14 (2)
0x10|      00                                       |  .             |        tag_alter_preservation: false 0x12-0x12.1 (0.1)
0x10|      00                                       |  .             |        file_alter_preservation: false 0x12.1-0x12.2 (0.1)
0x10|      00                                       |  .             |        read_only: false 0x12.2-0x12.3 (0.1)
0x10|      00                                       |  .             |        unused0: 0 0x12.3-0x13 (0.5)
0x10|         00                                    |   .            |        compression: false 0x13-0x13.1 (0.1)
0x10|         00                                    |   .            |        encryption: false 0x13.1-0x13.2 (0.1)
0x10|         00                                    |   .            |        grouping_identity: false 0x13.2-0x13.3 (0.1)
0x10|         00                                    |   .            |        unused1: 0 0x13.3-0x14 (0.5)
0x10|            01                                 |    .           |      text_encoding: "utf16" (1) 0x14-0x15 (1)
0x10|               ff fe 53 00 6f 00 66 00 74 00 77|     ..S.o.f.t.w|      description: "Software" 0x15-0x27 (18)
0x20|00 61 00 72 00 65 00|                          |.a.r.e.|        |
    |                                               |                |      value: "" 0x27-0x27 (0)