======================== unified (from filesystem) ========================
                                         'bitrate'  '187.408'
                                        'duration'  '147'
                                          'artist'  'Billy Bragg'
                                     'text_people'  ''
                                         'release'  'Back to Basics'
                                           'title'  'Between the Wars'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', "
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 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
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                                      'lastfmtags'  "['rock', 'political', 'british', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '19'
                                      'tracktotal'  '21'
                                            'date'  '1987'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-rock'
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                                             'key'  '10B'
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rest: ''

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

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'TBPM' (BPM (beats per minute))                     '94.9'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-rock'
'TDOR' (Original release time)                      '1987'
'TDRC' (Recording time)                             '1987'
'TIT2' (Title/songname/content description)         'Between the Wars'
'TKEY' (Initial key)                                '10B'
'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)               '19/21'
'TSO2'                                              'Bragg, Billy'
'TSOP' (Performer sort order)                       'Bragg, Billy'
'TXXX:ASIN'                                         'B000002H4H'
'TXXX:Acoustid Id'                                  '4b4aa11e-4d19-4dcb-b73e-e3cb817625b6'
'TXXX:BARCODE'                                      '075596072625'
'TXXX:CATALOGNUMBER'                                '9 60726-2'
'TXXX:MusicBrainz Album Artist Id'                  '7cec4a03-0a83-4308-856a-afb8aa5db0fc'
'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'                        '+0.88 dB'
'TXXX:replaygain_track_peak'                        '0.726736'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'1eb4e15b-01a5-4a17-917d-25dbd9b41e93')

========================== row from database ==========================
                                              'id'  1371490
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Billy Bragg - Back To Basics/19 - Between The Wars.mp3
                                         'working'  None
                                         'bitrate'  187
                                    'duration_sec'  147
                                           'genre'  ifs-songwriter-rock
                                        'filesize'  3458956
                                           'mtime'  1638562492
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos To 19 The ifs songwriter rock
                                      'tag_artist'  Billy Bragg
                                     'tag_release'  Back to Basics
                                       'tag_title'  Between the Wars
                                             'bpm'  94.9
                                    'search_title'  'between':1 'the':2 'wars':3
                                   'search_artist'  'billy':1 'bragg':2
                                  'search_release'  'back':1 'basics':3 'to':2
                                     'search_rest'  '00singer':1 '19':5 'eos':3 'ifs':7 'rock':8 'songwriter':2 'the':6 'to':4
                                    'search_combo'  '00singer':9 '19':13 'back':6C 'basics':8C 'between':1A 'billy':4B 'bragg':5B 'eos':11 'ifs':15 'rock':16 'songwriter':10 'the':2A,14 'to':7C,12 'wars':3A
                                    'tag_tracknum'  19
                                      'num_images'  0
                                             'key'  10B
                                           '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'  1638562491.9752944  (2021-12-03 21:14:51)
                             'size'  3458956