======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '259'
                                          'artist'  'Unsorted'
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                                         'release'  ''
                                           'title'  ''
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                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie-rock'
                                             'bpm'  '134.914'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '134.914'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-indie-rock'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Unsorted'
'TXXX:Mp3gain_minmax'                               '000,194'
'TXXX:Mp3gain_undo'                                 '+004,+004,N'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['sexy', 'blues']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.87 dB'
'TXXX:replaygain_track_peak'                        '0.557750'

========================== row from database ==========================
                                              'id'  1333997
                                            'path'  /data/Music/Bulk/00poprockelectronic/Dinosaur Jr/Unsorted/Dinosaur Jr. - Feel the Pain.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  259
                                           'genre'  ifs-songwriter-indie-rock
                                        'filesize'  4150831
                                           'mtime'  1637330404
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Dinosaur Jr Dinosaur Jr. Feel the Pain ifs songwriter indie rock
                                      'tag_artist'  Unsorted
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  134.914
                                    'search_title'  None
                                   'search_artist'  'unsorted':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'dinosaur':2 'feel':5 'ifs':8 'indie':10 'jr':3,4 'pain':7 'rock':11 'songwriter':9 'the':6
                                    'search_combo'  '00poprockelectronic':2 'dinosaur':3 'feel':6 'ifs':9 'indie':11 'jr':4,5 'pain':8 'rock':12 'songwriter':10 'the':7 'unsorted':1B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-piano-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['sexy', 'blues']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637330404.0468442  (2021-11-19 15:00:04)
                             'size'  4150831