======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '288'
                                          'artist'  'Bob Dylan'
                                     'text_people'  'Bob Dylan'
                                         'release'  "The Freewheelin' Bob Dylan"
                                           'title'  'I Shall Be Free'
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                                      'lastfmtags'  "['folk rock', 'rock', 'classic rock', 'folk', 'singer songwriter']"
                                     'discogstags'  "['folk, world, & country', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '13'
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-rock'
                                             'bpm'  '101'
                                             'key'  '4A'
                                        'acoustid'  '9beac9cf-7e5f-4338-b37d-2338ddd8a2ae'
rest: ''

======================== rawer (from filesystem) ========================

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'TALB' (Album/Movie/Show title)                     "The Freewheelin' Bob Dylan"
'TBPM' (BPM (beats per minute))                     '101'
'TCOM' (Composer)                                   'Bob Dylan'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-rock'
'TDOR' (Original release time)                      '1963'
'TDRC' (Recording time)                             '1989-07-05'
'TIPL' (Involved people list)                       TIPL(encoding=<Encoding.UTF16: 1>, people=[['producer', 'Tom Wilson'], ['lead vocals', 'Bob Dylan']])
'TIT2' (Title/songname/content description)         'I Shall Be Free'
'TKEY' (Initial key)                                '4A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Bob Dylan'
'TPE2' (Band/orchestra/accompaniment)               'Bob Dylan'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'CBS'
'TRCK' (Track number/Position in set)               '13/13'
'TSO2'                                              'Dylan, Bob'
'TSOP' (Performer sort order)                       'Dylan, Bob'
'TSRC' (ISRC (international standard recording code))  'USSM10307255/USSM19922908'
'TXXX:ASIN'                                         'B000026BD1'
'TXXX:Acoustid Id'                                  '9beac9cf-7e5f-4338-b37d-2338ddd8a2ae'
'TXXX:Artists'                                      'Bob Dylan'
'TXXX:BARCODE'                                      '5099703239027'
'TXXX:CATALOGNUMBER'                                'CDCBS 32390'
'TXXX:MusicBrainz Album Artist Id'                  '72c536dc-7137-4477-a521-567eeb840fa8'
'TXXX:MusicBrainz Album Id'                         'e7316c28-2d07-32c5-ae5c-e096c509b04d'
'TXXX:MusicBrainz Album Release Country'            'XE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '72c536dc-7137-4477-a521-567eeb840fa8'
'TXXX:MusicBrainz Release Group Id'                 '169b62aa-c3a5-3ed9-bed1-cc47c4bc51ad'
'TXXX:MusicBrainz Release Track Id'                 'f8d7692e-91f6-34a3-917c-d587d246b9dc'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['folk, world, & country', 'folk']
'TXXX:lastfmtags'                                   ['folk rock', 'rock', 'classic rock', 'folk', 'singer songwriter']
'TXXX:originalyear'                                 '1963'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.03 dB'
'TXXX:replaygain_track_peak'                        '0.483233'
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========================== row from database ==========================
                                              'id'  1533085
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Bob Dylan/1963 - The Freewheelin_ Bob Dylan/13 I Shall Be Free.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  288
                                           'genre'  ifs-songwriter-rock
                                        'filesize'  7017005
                                           'mtime'  1637522970
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 1963 Freewheelin_ 13 ifs songwriter rock
                                      'tag_artist'  Bob Dylan
                                     'tag_release'  The Freewheelin' Bob Dylan
                                       'tag_title'  I Shall Be Free
                                             'bpm'  101.0
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                                   'search_artist'  'bob':1 'dylan':2
                                  'search_release'  'bob':4 'dylan':5 'freewheelin':2,3 'the':1
                                     'search_rest'  '00singer':1 '1963':4 'eos':3 'freewheelin':5 'ifs':6 'rock':7 'songwriter':2
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                                    'tag_tracknum'  13
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['folk rock', 'rock', 'classic rock', 'folk', 'singer songwriter']
                                        'tag_date'  1989
                                     'discogstags'  ['folk, world, & country', 'folk']

============================== file details ==============================
                                           'mtime'  1637522970.3257453  (2021-11-21 20:29:30)
                             'size'  7017005