======================== unified (from filesystem) ========================
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                                        'duration'  '336'
                                          'artist'  'David Bowie'
                                     'text_people'  ''
                                         'release'  'The Singles Collection (disc 2'
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                                      'lastfmtags'  "['classic rock', '80s', 'alternative', 'rock', 'glam rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  ''
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-eos'
                                             'bpm'  '113.772'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '113.772'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-eos'
'TDRC' (Recording time)                             '1993'
'TIT2' (Title/songname/content description)         'Absolute Beginners'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'David Bowie'
'TRCK' (Track number/Position in set)               '17'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classic rock', '80s', 'alternative', 'rock', 'glam rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.40 dB'
'TXXX:replaygain_track_peak'                        '0.619534'

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/David Bowie/David Bowie - 1993 - The Singles Collection/1993 - The Singles Collection - Cd 2/MBZ;#David Bowie;#The Singles Collection (disc 2);#1993-12-00;#17;#Absolute Beginners.mp3
                                         'working'  None
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                                    'duration_sec'  336
                                           'genre'  ifs-songwriter-eos
                                        'filesize'  5381607
                                           'mtime'  1623430288
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                                        'rest_str'   00singer songwriter eos 1993 1993 Cd MBZ;#David Bowie;#The 2);#1993 12 00;#17;#Absolute ifs songwriter eos
                                      'tag_artist'  David Bowie
                                     'tag_release'  The Singles Collection (disc 2
                                       'tag_title'  Absolute Beginners
                                             'bpm'  113.772
                                    'search_title'  'absolute':1 'beginners':2
                                   'search_artist'  'bowie':2 'david':1
                                  'search_release'  '2':6 'collection':3 'disc':4,5 'singles':2 'the':1
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                                    'search_combo'  '00':28,31 '00singer':11 '17':29,32 '1993':14,25,27 '2':10C,24,26 'absolute':1A,30,33 'beginners':2A 'bowie':4B,20,22 'cd':15 'collection':7C 'david':3B,17,19 'disc':8C,9C 'eos':13 'ifs':34 'mbz':16,18 'singles':6C 'songwriter':12 'the':5C,21,23
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['classic rock', '80s', 'alternative', 'rock', 'glam rock']
                                        'tag_date'  1993
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1623430287.5582428  (2021-06-11 18:51:27)
                             'size'  5381607