======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '301'
                                          'artist'  'The Brian Setzer Orchestra'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Sing, Sing, Sing (with A Swing)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'big band', 'rock', 'rockabilly', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-pop'
                                             'bpm'  '108.821'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '108.821'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-pop'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Sing, Sing, Sing (with A Swing)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Brian Setzer Orchestra'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'big band', 'rock', 'rockabilly', 'swing']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'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'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.11 dB'
'TXXX:replaygain_track_peak'                        '0.580984'

========================== row from database ==========================
                                              'id'  678024
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Brian Setzer Orchestra/Brian Setzer Orchestra - Sing, Sing, Sing (With a Swing).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  301
                                           'genre'  prerock-jb-jazz-pop
                                        'filesize'  4832990
                                           'mtime'  1620528309
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country (With prerock jb jazz pop
                                      'tag_artist'  The Brian Setzer Orchestra
                                     'tag_release'  None
                                       'tag_title'  Sing, Sing, Sing (with A Swing)
                                             'bpm'  108.821
                                    'search_title'  'a':5 'sing':1,2 'swing':6,7 'with':3,4
                                   'search_artist'  'brian':2 'orchestra':4 'setzer':3 'the':1
                                  'search_release'  
                                     'search_rest'  'country':4 'exotica':2 'jazz':1 'jb':8 'oldies':3 'pop':9 'prerock':7 'with':5,6
                                    'search_combo'  'a':5A 'brian':9B 'country':15 'exotica':13 'jazz':12 'jb':19 'oldies':14 'orchestra':11B 'pop':20 'prerock':18 'setzer':10B 'sing':1A,2A 'swing':6A,7A 'the':8B 'with':3A,4A,16,17
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['jazz', 'big band', 'rock', 'rockabilly', 'swing']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528309.308335  (2021-05-09 04:45:09)
                             'size'  4832990