======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '147'
                                          'artist'  'The Crew-Cuts'
                                     'text_people'  ''
                                         'release'  'The Best of the Crew Cuts: The Mercury Years'
                                           'title'  'A Story Untold'
                                           'quals'  ("['Q-JZFKS-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-1', 'q-play-2', 'q-chart-1', "
 "'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['american', 'jazz', 'group', '50s', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '124'
                                      'tracktotal'  ''
                                            'date'  '1955'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '143.925'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Best of the Crew Cuts: The Mercury Years'
'TBPM' (BPM (beats per minute))                     '143.925'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1955'
'TIT2' (Title/songname/content description)         'A Story Untold'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Crew-Cuts'
'TRCK' (Track number/Position in set)               '124'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['american', 'jazz', 'group', '50s', 'oldies']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.28 dB'
'TXXX:replaygain_track_peak'                        '0.534011'

========================== row from database ==========================
                                              'id'  1434646
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1955/1955-124 - The Crew-Cuts - A Story Untold.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  147
                                           'genre'  prerock-vocal
                                        'filesize'  5883818
                                           'mtime'  1620385798
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1955 1955 124 prerock vocal
                                      'tag_artist'  The Crew-Cuts
                                     'tag_release'  The Best of the Crew Cuts: The Mercury Years
                                       'tag_title'  A Story Untold
                                             'bpm'  143.925
                                    'search_title'  'a':1 'story':2 'untold':3
                                   'search_artist'  'crew':2 'crewcuts':4 'cuts':3 'the':1
                                  'search_release'  'best':2 'crew':4 'cuts':5,6 'mercury':7 'of':3 'the':1 'years':8
                                     'search_rest'  '00oldiepop':5 '124':7 '1955':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'vocal':9
                                    'search_combo'  '00oldiepop':20 '124':22 '1955':21 'a':1A 'best':9C 'country':19 'crew':5B,11C 'crewcuts':7B 'cuts':6B,12C,13C 'exotica':17 'jazz':16 'mercury':14C 'of':10C 'oldies':18 'prerock':23 'story':2A 'the':4B,8C 'untold':3A 'vocal':24 'years':15C
                                    'tag_tracknum'  124
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['american', 'jazz', 'group', '50s', 'oldies']
                                        'tag_date'  1955
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385798.1046236  (2021-05-07 13:09:58)
                             'size'  5883818