======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '172'
                                          'artist'  'Fred Carboni'
                                     'text_people'  ''
                                         'release'  'Unknown French Album (cd3)'
                                           'title'  ''
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'loc-eur-france'
                                             'bpm'  '108.008'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Unknown French Album (cd3)'
'TBPM' (BPM (beats per minute))                     '108.008'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-france'
'TDRC' (Recording time)                             '1995'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Fred Carboni'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Mp3gain_minmax'                               '086,206'
'TXXX:Mp3gain_undo'                                 '+004,+004,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:Tracknum'                                     "06Parlez moi d'amour"
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.75 dB'
'TXXX:replaygain_track_peak'                        '0.386169'

========================== row from database ==========================
                                              'id'  1510157
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/00french/Unknown French album (cd3)/06Parlez moi d_amour-Fred Carboni.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  172
                                           'genre'  loc-eur-france
                                        'filesize'  2763112
                                           'mtime'  1620534675
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe 00french album 06Parlez moi d_amour loc eur france
                                      'tag_artist'  Fred Carboni
                                     'tag_release'  Unknown French Album (cd3)
                                       'tag_title'  None
                                             'bpm'  108.008
                                    'search_title'  None
                                   'search_artist'  'carboni':2 'fred':1
                                  'search_release'  'album':3 'cd3':4,5 'french':2 'unknown':1
                                     'search_rest'  '00french':4 '00mid':1 '06parlez':6 'album':5 'amour':9 'd':8 'eur':11 'europe':3 'france':12 'loc':10 'moi':7 'north':2
                                    'search_combo'  '00french':11 '00mid':8 '06parlez':13 'album':5C,12 'amour':16 'carboni':2B 'cd3':6C,7C 'd':15 'eur':18 'europe':10 'france':19 'fred':1B 'french':4C 'loc':17 'moi':14 'north':9 'unknown':3C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-piano-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620534674.6894436  (2021-05-09 06:31:14)
                             'size'  2763112