======================== unified (from filesystem) ========================
                                         'bitrate'  '195.039'
                                        'duration'  '204'
                                          'artist'  'Cat Power'
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                                      'lastfmtags'  "['indie', 'alternative', 'female vocalists', 'folk', 'singer songwriter']"
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                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
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                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-eos'
                                             'bpm'  '112.321'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Covers Record'
'TBPM' (BPM (beats per minute))                     '112.321'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-eos'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Paths of Victory'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Cat Power'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'indie rock', 'folk rock']
'TXXX:lastfmtags'                                   ['indie', 'alternative', 'female vocalists', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.20 dB'
'TXXX:replaygain_track_peak'                        '0.470360'

========================== row from database ==========================
                                              'id'  1236228
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Cat Power/The Covers Record/10-Paths_of_Victory.mp3
                                         'working'  None
                                         'bitrate'  195
                                    'duration_sec'  204
                                           'genre'  ifs-songwriter-eos
                                        'filesize'  4978175
                                           'mtime'  1620645114
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 10 Paths_of_Victory ifs songwriter eos
                                      'tag_artist'  Cat Power
                                     'tag_release'  The Covers Record
                                       'tag_title'  Paths of Victory
                                             'bpm'  112.321
                                    'search_title'  'of':2 'paths':1 'victory':3
                                   'search_artist'  'cat':1 'power':2
                                  'search_release'  'covers':2 'record':3 'the':1
                                     'search_rest'  '00singer':1 'eos':3 'ifs':7 'of':5 'paths':4 'songwriter':2 'victory':6
                                    'search_combo'  '00singer':9 'cat':4B 'covers':7C 'eos':11 'ifs':15 'of':2A,13 'paths':1A,12 'power':5B 'record':8C 'songwriter':10 'the':6C 'victory':3A,14
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'alternative', 'female vocalists', 'folk', 'singer songwriter']
                                        'tag_date'  2000
                                     'discogstags'  ['rock', 'indie rock', 'folk rock']

============================== file details ==============================
                                           'mtime'  1620645113.656499  (2021-05-10 13:11:53)
                             'size'  4978175