======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '257'
                                          'artist'  'Georges Brassens'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'La Princesse et le Croque-Notes'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['chanson', 'francais', 'chanson francaise', 'french', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '05'
                                      'tracktotal'  ''
                                            'date'  '1950'
                                        'comments'  ''
                                           'genre'  'loc-eur-france'
                                             'bpm'  '116.320'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '116.320'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-france'
'TDRC' (Recording time)                             '1950'
'TIT2' (Title/songname/content description)         'La Princesse et le Croque-Notes'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Georges Brassens'
'TRCK' (Track number/Position in set)               '05'
'TSOP' (Performer sort order)                       'Brassens, Georges'
'TXXX:Artists'                                      'Georges Brassens'
'TXXX:MusicBrainz Artist Id'                        'b58165ba-ac55-49a1-8855-caf16c68f5f2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['chanson', 'francais', 'chanson francaise', 'french', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.13 dB'
'TXXX:replaygain_track_peak'                        '0.675545'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'66b51778-1acd-4d91-a77b-05d515572eb8')

========================== row from database ==========================
                                              'id'  1399413
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/Georges Brassens/Mourir pour des Idées/georges brassens_mourir_05 - la princesse et le croque notes.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  257
                                           'genre'  loc-eur-france
                                        'filesize'  4127315
                                           'mtime'  1620535288
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe Mourir pour des Idées georges brassens_mourir_05 la princesse croque notes loc eur france
                                      'tag_artist'  Georges Brassens
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  La Princesse et le Croque-Notes
                                             'bpm'  116.32
                                    'search_title'  'croque':5 'croquenotes':7 'et':3 'la':1 'le':4 'notes':6 'princesse':2
                                   'search_artist'  'brassens':2 'georges':1
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00mid':1 '05':12 'brassens':10 'croque':15 'des':6 'eur':18 'europe':3 'france':19 'georges':9 'idees':7,8 'la':13 'loc':17 'mourir':4,11 'north':2 'notes':16 'pour':5 'princesse':14
                                    'search_combo'  '00mid':15 '05':26 'album':11C 'brassens':9B,24 'croque':5A,29 'croquenotes':7A 'des':20 'et':3A 'eur':32 'europe':17 'france':33 'georges':8B,23 'idees':21,22 'la':1A,27 'le':4A 'loc':31 'mourir':18,25 'non':10C 'nonalbum':12C 'north':16 'notes':6A,30 'pour':19 'princesse':2A,28 'tracks':13C,14C
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['chanson', 'francais', 'chanson francaise', 'french', 'singer songwriter']
                                        'tag_date'  1950
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620535288.4190834  (2021-05-09 06:41:28)
                             'size'  4127315