======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '276'
                                          'artist'  'Hamburglers'
                                     'text_people'  ''
                                         'release'  'Happy Meal'
                                           'title'  'A McFriendly Smile'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', "
 "'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-1']")
                                     'discogstags'  "['electronic', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '120.1'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Happy Meal'
'TBPM' (BPM (beats per minute))                     '120.1'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'A McFriendly Smile'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Hamburglers'
'TPE2' (Band/orchestra/accompaniment)               'Hamburglers'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electronic', 'experimental']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.15 dB'
'TXXX:replaygain_track_peak'                        '0.729590'

========================== row from database ==========================
                                              'id'  649430
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/music for maniacs/Hamburglers - a mcfriendly smile.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  276
                                           'genre'  electronic-unsorted
                                        'filesize'  4436604
                                           'mtime'  1620544376
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm music for maniacs mcfriendly smile electronic unsorted
                                      'tag_artist'  Hamburglers
                                     'tag_release'  Happy Meal
                                       'tag_title'  A McFriendly Smile
                                             'bpm'  120.1
                                    'search_title'  'a':1 'friendly':5 'mc':4 'mcfriendly':2 'smile':3
                                   'search_artist'  'hamburglers':1
                                  'search_release'  'happy':1 'meal':2
                                     'search_rest'  'electronic':6 'for':2 'maniacs':3 'mcfriendly':4 'music':1 'smile':5 'unsorted':7
                                    'search_combo'  'a':1A 'electronic':14 'for':10 'friendly':5A 'hamburglers':6B 'happy':7C 'maniacs':11 'mc':4A 'mcfriendly':2A,12 'meal':8C 'music':9 'smile':3A,13 'unsorted':15
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-1', 'q-other-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  2002
                                     'discogstags'  ['electronic', 'experimental']

============================== file details ==============================
                                           'mtime'  1620544376.1704333  (2021-05-09 09:12:56)
                             'size'  4436604