======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '228'
                                          'artist'  'The Mamas & the Papas'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Creque Alley'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['pop', 'rock', 'oldies', '60s', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1965'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;rock-cppex'
                                             'bpm'  '145.685'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '145.685'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'rock-cppex']
'TDRC' (Recording time)                             '1965'
'TIT2' (Title/songname/content description)         'Creque Alley'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Mamas & the Papas'
'TXXX:Mp3gain_minmax'                               '000,192'
'TXXX:Mp3gain_undo'                                 '+004,+004,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['pop', 'rock', 'oldies', '60s', 'classic rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.47 dB'
'TXXX:replaygain_track_peak'                        '0.491270'

========================== row from database ==========================
                                              'id'  1412173
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/The Mamas & the Papas - The Mamas And The Papas/The Best Of/The Mamas and the Papas - Creque Alley.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  228
                                           'genre'  rock-cppex-classic;rock-cppex
                                        'filesize'  3653284
                                           'mtime'  1636038924
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy And Best Of and rock cppex classic;rock cppex
                                      'tag_artist'  The Mamas & the Papas
                                     'tag_release'  None
                                       'tag_title'  Creque Alley
                                             'bpm'  145.685
                                    'search_title'  'alley':2 'creque':1
                                   'search_artist'  'mamas':2 'papas':3 'the':1
                                  'search_release'  
                                     'search_rest'  'and':2 'best':3 'classic':7,9 'classicprogpsy':1 'cppex':6 'of':4 'rock':5,8,10
                                    'search_combo'  'alley':2A 'and':7 'best':8 'classic':12,14 'classicprogpsy':6 'cppex':11 'creque':1A 'mamas':4B 'of':9 'papas':5B 'rock':10,13,15 'the':3B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['pop', 'rock', 'oldies', '60s', 'classic rock']
                                        'tag_date'  1965
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636038924.4123445  (2021-11-04 16:15:24)
                             'size'  3653284