======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '201'
                                          'artist'  'Britney Spears'
                                     'text_people'  ''
                                         'release'  'German Top100 Single Charts'
                                           'title'  'Toxic'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-UNU-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'sexy', 'female vocalists', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '40'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-produced'
                                             'bpm'  '143.011'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'German Top100 Single Charts'
'TBPM' (BPM (beats per minute))                     '143.011'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-produced'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Toxic'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Britney Spears'
'TRCK' (Track number/Position in set)               '40'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['dance', 'sexy', 'female vocalists', 'pop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.29 dB'
'TXXX:replaygain_track_peak'                        '0.434811'

========================== row from database ==========================
                                              'id'  1403984
                                            'path'  /data/Music/Bulk/00poprockelectronic-generic-dance-trapbeat/Britney Spears/40. Toxic.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  201
                                           'genre'  electronic-generic or radio-produced
                                        'filesize'  4845545
                                           'mtime'  1621695838
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic generic dance trapbeat 40. electronic generic or radio produced
                                      'tag_artist'  Britney Spears
                                     'tag_release'  German Top100 Single Charts
                                       'tag_title'  Toxic
                                             'bpm'  143.011
                                    'search_title'  'toxic':1
                                   'search_artist'  'britney':1 'spears':2
                                  'search_release'  'charts':4 'german':1 'single':3 'top100':2
                                     'search_rest'  '00poprockelectronic':1 '40':5,6 'dance':3 'electronic':7 'generic':2 'or':8 'produced':10 'radio':9 'trapbeat':4
                                    'search_combo'  '00poprockelectronic':8 '40':12,13 'britney':2B 'charts':7C 'dance':10 'electronic':14 'generic':9 'german':4C 'or':15 'produced':17 'radio':16 'single':6C 'spears':3B 'top100':5C 'toxic':1A 'trapbeat':11
                                    'tag_tracknum'  40
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'sexy', 'female vocalists', 'pop']
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621695838.225981  (2021-05-22 17:03:58)
                             'size'  4845545