======================== unified (from filesystem) ========================
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                                      'lastfmtags'  "['indie', 'alternative', 'rock', 'indie rock', 'singer songwriter']"
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                                      'tracktotal'  '16'
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
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'TBPM' (BPM (beats per minute))                     '142'
'TCOM' (Composer)                                   'Eels/Mickey P.'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDOR' (Original release time)                      '1998'
'TDRC' (Recording time)                             '1998'
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'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'eels'
'TPE2' (Band/orchestra/accompaniment)               'eels'
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'TPUB' (Publisher)                                  'DreamWorks Records'
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'TXXX:lastfmtags'                                   ['indie', 'alternative', 'rock', 'indie rock', 'singer songwriter']
'TXXX:originalyear'                                 '1998'
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========================== row from database ==========================
                                              'id'  1246084
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Eels - Electro-Shock Blues/03 Cancer For The Cure.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  286
                                           'genre'  ifs-songwriter
                                        'filesize'  4649397
                                           'mtime'  1636401747
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                                      'tag_artist'  eels
                                     'tag_release'  Electro-Shock Blues
                                       'tag_title'  Cancer for the Cure
                                             'bpm'  142.0
                                    'search_title'  'cancer':1 'cure':4 'for':2 'the':3
                                   'search_artist'  'eels':1
                                  'search_release'  'blues':4 'electro':1 'electroshock':3 'shock':2
                                     'search_rest'  '00singer':1 'eels':4 'eos':3 'for':5 'ifs':7 'songwriter':2 'the':6
                                    'search_combo'  '00singer':10 'blues':9C 'cancer':1A 'cure':4A 'eels':5B,13 'electro':6C 'electroshock':8C 'eos':12 'for':2A,14 'ifs':16 'shock':7C 'songwriter':11 'the':3A,15
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-3', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'alternative', 'rock', 'indie rock', 'singer songwriter']
                                        'tag_date'  1998
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636401746.5524335  (2021-11-08 21:02:26)
                             'size'  4649397