======================== unified (from filesystem) ========================
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                                        'duration'  '207'
                                          'artist'  'eels'
                                     'text_people'  'Eels/Michael Simpson'
                                         'release'  'Electro-Shock Blues'
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                                      'lastfmtags'  "['indie', 'alternative', 'rock', 'indie rock', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '16'
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '104'
                                             'key'  '12B'
                                        'acoustid'  '9db7aac9-128b-4109-9694-e6a1e36526c8'
rest: ''

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'TALB' (Album/Movie/Show title)                     'Electro-Shock Blues'
'TBPM' (BPM (beats per minute))                     '104'
'TCOM' (Composer)                                   'Eels/Michael Simpson'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDOR' (Original release time)                      '1998'
'TDRC' (Recording time)                             '1998'
'TENC' (Encoded by)                                 'iTunes v7.0.2.16'
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'TIT2' (Title/songname/content description)         'Last Stop: This Town'
'TKEY' (Initial key)                                '12B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'eels'
'TPE2' (Band/orchestra/accompaniment)               'eels'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'DreamWorks Records'
'TRCK' (Track number/Position in set)               '10/16'
'TSO2'                                              'EELS'
'TSOP' (Performer sort order)                       'EELS'
'TSRC' (ISRC (international standard recording code))  'USDW19805210'
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'TXXX:Artists'                                      'eels'
'TXXX:BARCODE'                                      '600445005228'
'TXXX:CATALOGNUMBER'                                'DRD 50052'
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'TXXX:MusicBrainz Album Id'                         '971490c3-7536-4881-9132-434727558f8e'
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'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'                                   ['indie', 'alternative', 'rock', 'indie rock', 'singer songwriter']
'TXXX:originalyear'                                 '1998'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
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'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.51 dB'
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========================== row from database ==========================
                                              'id'  1263846
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Eels - Electro-Shock Blues/10 Last Stop_ This Town.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  207
                                           'genre'  ifs-songwriter
                                        'filesize'  3377119
                                           'mtime'  1636401747
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos Eels 10 Stop_ ifs songwriter
                                      'tag_artist'  eels
                                     'tag_release'  Electro-Shock Blues
                                       'tag_title'  Last Stop: This Town
                                             'bpm'  104.0
                                    'search_title'  'last':1 'stop':2,3 'this':4 'town':5
                                   'search_artist'  'eels':1
                                  'search_release'  'blues':4 'electro':1 'electroshock':3 'shock':2
                                     'search_rest'  '00singer':1 'eels':4 'eos':3 'ifs':6 'songwriter':2 'stop':5
                                    'search_combo'  '00singer':11 'blues':10C 'eels':6B,14 'electro':7C 'electroshock':9C 'eos':13 'ifs':16 'last':1A 'shock':8C 'songwriter':12 'stop':2A,3A,15 'this':4A 'town':5A
                                    'tag_tracknum'  10
                                      'num_images'  1
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'alternative', 'rock', 'indie rock', 'singer songwriter']
                                        'tag_date'  1998
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636401747.4210575  (2021-11-08 21:02:27)
                             'size'  3377119