======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '268'
                                          'artist'  'Paul & Linda McCartney'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'The Back Seat Of My Car'
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['classic rock', 'rock', '70s', 'pop', 'pop rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '144.028'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '144.028'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TIT2' (Title/songname/content description)         'The Back Seat Of My Car'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Paul & Linda McCartney'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classic rock', 'rock', '70s', 'pop', 'pop rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.39 dB'
'TXXX:replaygain_track_peak'                        '0.451758'

========================== row from database ==========================
                                              'id'  1329383
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/12 Paul & Linda McCartney - The Back Seat Of My Car.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  268
                                           'genre'  rock-unsorted
                                        'filesize'  5365760
                                           'mtime'  1620392274
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 12 rock unsorted
                                      'tag_artist'  Paul & Linda McCartney
                                     'tag_release'  None
                                       'tag_title'  The Back Seat Of My Car
                                             'bpm'  144.028
                                    'search_title'  'back':2 'car':6 'my':5 'of':4 'seat':3 'the':1
                                   'search_artist'  'cartney':5 'linda':2 'mc':4 'mccartney':3 'paul':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'files':5,6 'loose':3,4 'rock':7 'unsorted':2
                                    'search_combo'  '00poprockelectronic':12 'back':2A 'car':6A 'cartney':11B 'files':16,17 'linda':8B 'loose':14,15 'mc':10B 'mccartney':9B 'my':5A 'of':4A 'paul':7B 'rock':18 'seat':3A 'the':1A 'unsorted':13
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['classic rock', 'rock', '70s', 'pop', 'pop rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620392274.1532543  (2021-05-07 14:57:54)
                             'size'  5365760