======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '193'
                                          'artist'  'Stray Cats'
                                     'text_people'  ''
                                         'release'  'Stray Cats'
                                           'title'  'Ubangi Stomp'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['80s', 'rock n roll', 'psychobilly', 'rockabilly', 'rock']"
                                     'discogstags'  "['rock', 'rockabilly']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1981'
                                        'comments'  ''
                                           'genre'  'rock-rockabilly or psychobilly'
                                             'bpm'  '135.8'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:2\x10\x00\x00'                   PRIV(owner='AverageLevel', data=b'2\x10\x00\x00')
'PRIV:PeakValue:6~\x00\x00'                         PRIV(owner='PeakValue', data=b'6~\x00\x00')
'TALB' (Album/Movie/Show title)                     'Stray Cats'
'TBPM' (BPM (beats per minute))                     '135.8'
'TCON' (Content type, a.k.a. Genre)                 'rock-rockabilly or psychobilly'
'TDRC' (Recording time)                             '1981'
'TIT2' (Title/songname/content description)         'Ubangi Stomp'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Stray Cats'
'TRCK' (Track number/Position in set)               '3'
'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:discogstags'                                  ['rock', 'rockabilly']
'TXXX:lastfmtags'                                   ['80s', 'rock n roll', 'psychobilly', 'rockabilly', 'rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.21 dB'
'TXXX:replaygain_track_peak'                        '0.697254'

========================== row from database ==========================
                                              'id'  1325023
                                            'path'  /data/Music/Bulk/00poprockelectronic/Stray Cats/Stray Cats - (1981) Stray Cats/Stray Cats - (1981) Stray Cats - 03 Ubangi Stomp.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  193
                                           'genre'  rock-rockabilly or psychobilly
                                        'filesize'  4650965
                                           'mtime'  1620525855
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic (1981) (1981) 03 rock rockabilly or psychobilly
                                      'tag_artist'  Stray Cats
                                     'tag_release'  Stray Cats
                                       'tag_title'  Ubangi Stomp
                                             'bpm'  135.8
                                    'search_title'  'stomp':2 'ubangi':1
                                   'search_artist'  'cats':2 'stray':1
                                  'search_release'  'cats':2 'stray':1
                                     'search_rest'  '00poprockelectronic':1 '1981':2,3 'or':6 'psychobilly':7 'rock':4 'rockabilly':5
                                    'search_combo'  '00poprockelectronic':7 '1981':8,9 'cats':4B,6C 'or':12 'psychobilly':13 'rock':10 'rockabilly':11 'stomp':2A 'stray':3B,5C 'ubangi':1A
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'rock n roll', 'psychobilly', 'rockabilly', 'rock']
                                        'tag_date'  1981
                                     'discogstags'  ['rock', 'rockabilly']

============================== file details ==============================
                                           'mtime'  1620525855.1803486  (2021-05-09 04:04:15)
                             'size'  4650965