======================== unified (from filesystem) ========================
                                         'bitrate'  '178.477'
                                        'duration'  '77'
                                          'artist'  'Billy Bragg'
                                     'text_people'  ''
                                         'release'  'Back to Basics'
                                           'title'  'Lovers Town Revisited'
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                                      'lastfmtags'  "['rock', 'political', 'british', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '21'
                                            'date'  '1987'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-rock'
                                             'bpm'  '114.1'
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rest: ''

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

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'TBPM' (BPM (beats per minute))                     '114.1'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-rock'
'TDOR' (Original release time)                      '1987'
'TDRC' (Recording time)                             '1987'
'TIT2' (Title/songname/content description)         'Lovers Town Revisited'
'TKEY' (Initial key)                                '10A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Billy Bragg'
'TPE2' (Band/orchestra/accompaniment)               'Billy Bragg'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Elektra/Asylum Records'
'TRCK' (Track number/Position in set)               '4/21'
'TSO2'                                              'Bragg, Billy'
'TSOP' (Performer sort order)                       'Bragg, Billy'
'TXXX:ASIN'                                         'B000002H4H'
'TXXX:Acoustid Id'                                  'bde3a465-23aa-4182-bd36-62f02719ae7a'
'TXXX:BARCODE'                                      '075596072625'
'TXXX:CATALOGNUMBER'                                '9 60726-2'
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'TXXX:MusicBrainz Album Id'                         'dbf831ee-81e5-4897-867e-0f4bbe21a933'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        '7cec4a03-0a83-4308-856a-afb8aa5db0fc'
'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:lastfmtags'                                   ['rock', 'political', 'british', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.03 dB'
'TXXX:replaygain_track_peak'                        '0.534701'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'c80cbf0e-b2c2-411e-8fca-bd92b74cce0a')

========================== row from database ==========================
                                              'id'  1367576
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Billy Bragg - Back To Basics/04 - Lovers Town Revisited.mp3
                                         'working'  None
                                         'bitrate'  178
                                    'duration_sec'  77
                                           'genre'  ifs-songwriter-rock
                                        'filesize'  1739480
                                           'mtime'  1638562490
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 04 ifs songwriter rock
                                      'tag_artist'  Billy Bragg
                                     'tag_release'  Back to Basics
                                       'tag_title'  Lovers Town Revisited
                                             'bpm'  114.1
                                    'search_title'  'lovers':1 'revisited':3 'town':2
                                   'search_artist'  'billy':1 'bragg':2
                                  'search_release'  'back':1 'basics':3 'to':2
                                     'search_rest'  '00singer':1 'eos':3 'ifs':4 'rock':5 'songwriter':2
                                    'search_combo'  '00singer':9 'back':6C 'basics':8C 'billy':4B 'bragg':5B 'eos':11 'ifs':12 'lovers':1A 'revisited':3A 'rock':13 'songwriter':10 'to':7C 'town':2A
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-3']
                                      'lastfmtags'  ['rock', 'political', 'british', 'folk', 'singer songwriter']
                                        'tag_date'  1987
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1638562489.5873666  (2021-12-03 21:14:49)
                             'size'  1739480