======================== unified (from filesystem) ========================
                                         'bitrate'  '190.609'
                                        'duration'  '185'
                                          'artist'  'Jacques Brel'
                                     'text_people'  ''
                                         'release'  'The Best Of Jacques Brel'
                                           'title'  'Mon pere disait'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['belgian', 'chanson', 'chanson francaise', 'french', 'singer songwriter']"
                                     'discogstags'  "['chanson', 'vocal', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  '24'
                                            'date'  '1988'
                                        'comments'  ''
                                           'genre'  'loc-eur-france'
                                             'bpm'  '135.819'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Best Of Jacques Brel'
'TBPM' (BPM (beats per minute))                     '135.819'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-france'
'TDRC' (Recording time)                             '1988'
'TIT2' (Title/songname/content description)         'Mon pere disait'
'TKEY' (Initial key)                                '2A'
'TMED' (Media type)                                 '(CD) - CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Jacques Brel'
'TRCK' (Track number/Position in set)               '17/24'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['chanson', 'vocal', 'pop']
'TXXX:lastfmtags'                                   ['belgian', 'chanson', 'chanson francaise', 'french', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.28 dB'
'TXXX:replaygain_track_peak'                        '0.594039'

========================== row from database ==========================
                                              'id'  1251562
                                            'path'  /data/Music/Bulk/00localcharacter/Jacques Brel/The Best Of Jacques Brel/17 - mon pere disait.mp3
                                         'working'  None
                                         'bitrate'  190
                                    'duration_sec'  185
                                           'genre'  loc-eur-france
                                        'filesize'  4427786
                                           'mtime'  1620536043
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 17 mon loc eur france
                                      'tag_artist'  Jacques Brel
                                     'tag_release'  The Best Of Jacques Brel
                                       'tag_title'  Mon pere disait
                                             'bpm'  135.819
                                    'search_title'  'disait':3 'mon':1 'pere':2
                                   'search_artist'  'brel':2 'jacques':1
                                  'search_release'  'best':2 'brel':5 'jacques':4 'of':3 'the':1
                                     'search_rest'  'eur':3 'france':4 'loc':2 'mon':1
                                    'search_combo'  'best':7C 'brel':5B,10C 'disait':3A 'eur':13 'france':14 'jacques':4B,9C 'loc':12 'mon':1A,11 'of':8C 'pere':2A 'the':6C
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['belgian', 'chanson', 'chanson francaise', 'french', 'singer songwriter']
                                        'tag_date'  1988
                                     'discogstags'  ['chanson', 'vocal', 'pop']

============================== file details ==============================
                                           'mtime'  1620536042.5583863  (2021-05-09 06:54:02)
                             'size'  4427786