======================== unified (from filesystem) ========================
                                         'bitrate'  '183.284'
                                        'duration'  '49'
                                          'artist'  'Prince and The Revolution'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Darling Nikki'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', "
 "'q-grit-2', 'q-play-2', 'Q-JZFKS-3', 'Q-OLDST-2', 'q-chart-2', 'q-drums-1', "
 "'q-other-1', 'q-piano-1', 'q-vocals-4', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['funk', 'pop', 'rock', '80s', 'soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'funk or soul-funk-pop'
                                             'bpm'  '84.7'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '84.7'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul-funk-pop'
'TIT2' (Title/songname/content description)         'Darling Nikki'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Prince and The Revolution'
'TXXX:Mp3gain_minmax'                               '138,181'
'TXXX:Mp3gain_undo'                                 '+002,+002,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['funk', 'pop', 'rock', '80s', 'soul']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.57 dB'
'TXXX:replaygain_track_peak'                        '0.624759'

========================== row from database ==========================
                                              'id'  1292657
                                            'path'  /data/Music/Bulk/00poprockelectronic/Prince/Prince and the Revolution - Darling Nikki.mp3
                                         'working'  None
                                         'bitrate'  183
                                    'duration_sec'  49
                                           'genre'  funk or soul-funk-pop
                                        'filesize'  1126666
                                           'mtime'  1620571788
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic the funk or soul funk pop
                                      'tag_artist'  Prince and The Revolution
                                     'tag_release'  None
                                       'tag_title'  Darling Nikki
                                             'bpm'  84.7
                                    'search_title'  'darling':1 'nikki':2
                                   'search_artist'  'and':2 'prince':1 'revolution':4 'the':3
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'funk':3 'or':4 'pop':6 'soul':5 'the':2
                                    'search_combo'  '00poprockelectronic':7 'and':4B 'darling':1A 'funk':9 'nikki':2A 'or':10 'pop':12 'prince':3B 'revolution':6B 'soul':11 'the':5B,8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['funk', 'pop', 'rock', '80s', 'soul']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620571787.9664981  (2021-05-09 16:49:47)
                             'size'  1126666