======================== unified (from filesystem) ========================
                                         'bitrate'  '238.939'
                                        'duration'  '294'
                                          'artist'  'The Blood Brothers'
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                                      'lastfmtags'  "['indie', 'post hardcore', 'hardcore', 'experimental', 'screamo']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '7'
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'eid-noise-screamo'
                                             'bpm'  '125.939'
                                             'key'  '5A'
                                        'acoustid'  '552e25ee-36f6-4f0f-944b-ffadad02c974'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '125.939'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'eid-noise-screamo'
'TDOR' (Original release time)                      '2006'
'TDRC' (Recording time)                             '2006-05-23'
'TENC' (Encoded by)                                 'iTunes v7.0.0.70'
'TIT2' (Title/songname/content description)         'Metronomes'
'TKEY' (Initial key)                                '5A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The Blood Brothers'
'TPE2' (Band/orchestra/accompaniment)               'The Blood Brothers'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'V2'
'TRCK' (Track number/Position in set)               '3/7'
'TSO2'                                              'Blood Brothers, The'
'TSOP' (Performer sort order)                       'Blood Brothers, The'
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'TXXX:lastfmtags'                                   ['indie', 'post hardcore', 'hardcore', 'experimental', 'screamo']
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'TXXX:q-piano'                                      '1'
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'TXXX:q-syn'                                        '2'
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'TXXX:replaygain_track_gain'                        '-1.23 dB'
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========================== row from database ==========================
                                              'id'  435766
                                            'path'  /data/Music/Bulk/00dwimp/The Blood Brothers/[2006] Love Rhymes with Hideous Car Wreck/03 Metronomes.mp3
                                         'working'  None
                                         'bitrate'  238
                                    'duration_sec'  294
                                           'genre'  eid-noise-screamo
                                        'filesize'  8940344
                                           'mtime'  1620311497
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp [2006] with 03 eid noise screamo
                                      'tag_artist'  The Blood Brothers
                                     'tag_release'  Love Rhymes With Hideous Car Wreck
                                       'tag_title'  Metronomes
                                             'bpm'  125.939
                                    'search_title'  'metronomes':1
                                   'search_artist'  'blood':2 'brothers':3 'the':1
                                  'search_release'  'car':5 'hideous':4 'love':1 'rhymes':2 'with':3 'wreck':6
                                     'search_rest'  '00dwimp':1 '2006':2,3 'eid':5 'noise':6 'screamo':7 'with':4
                                    'search_combo'  '00dwimp':11 '2006':12,13 'blood':3B 'brothers':4B 'car':9C 'eid':15 'hideous':8C 'love':5C 'metronomes':1A 'noise':16 'rhymes':6C 'screamo':17 'the':2B 'with':7C,14 'wreck':10C
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-1', 'q-bass-4', 'q-grit-3']
                                      'lastfmtags'  ['indie', 'post hardcore', 'hardcore', 'experimental', 'screamo']
                                        'tag_date'  2006
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620311496.9244983  (2021-05-06 16:31:36)
                             'size'  8940344