======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '195'
                                          'artist'  'The Doobie Brothers'
                                     'text_people'  ''
                                         'release'  'Best Of The Doobies'
                                           'title'  'China Grove'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['southern rock', 'rock', 'soft rock', '70s', 'classic rock']"
                                     'discogstags'  "['rock', 'pop rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1978'
                                        'comments'  ''
                                           'genre'  'rock-pop-soft'
                                             'bpm'  '97.225'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Best Of The Doobies'
'TBPM' (BPM (beats per minute))                     '97.225'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-soft'
'TDOR' (Original release time)                      '1978'
'TDRC' (Recording time)                             '1978'
'TIT2' (Title/songname/content description)         'China Grove'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Doobie Brothers'
'TRCK' (Track number/Position in set)               '1'
'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:discogstags'                                  ['rock', 'pop rock', 'classic rock']
'TXXX:lastfmtags'                                   ['southern rock', 'rock', 'soft rock', '70s', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.22 dB'
'TXXX:replaygain_track_peak'                        '0.668419'

========================== row from database ==========================
                                              'id'  1349180
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Doobie Brothers/Best Of The Doobies__cifs2653.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  195
                                           'genre'  rock-pop-soft
                                        'filesize'  3126936
                                           'mtime'  1620736556
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Doobies__cifs2653 rock pop soft
                                      'tag_artist'  The Doobie Brothers
                                     'tag_release'  Best Of The Doobies
                                       'tag_title'  China Grove
                                             'bpm'  97.225
                                    'search_title'  'china':1 'grove':2
                                   'search_artist'  'brothers':3 'doobie':2 'the':1
                                  'search_release'  'best':1 'doobies':4 'of':2 'the':3
                                     'search_rest'  '00poprockelectronic':1 'cifs2653':3 'doobies':2 'pop':5 'rock':4 'soft':6
                                    'search_combo'  '00poprockelectronic':10 'best':6C 'brothers':5B 'china':1A 'cifs2653':12 'doobie':4B 'doobies':9C,11 'grove':2A 'of':7C 'pop':14 'rock':13 'soft':15 'the':3B,8C
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['southern rock', 'rock', 'soft rock', '70s', 'classic rock']
                                        'tag_date'  1978
                                     'discogstags'  ['rock', 'pop rock', 'classic rock']

============================== file details ==============================
                                           'mtime'  1620736556.4169264  (2021-05-11 14:35:56)
                             'size'  3126936