======================== unified (from filesystem) ========================
                                         'bitrate'  '189.25'
                                        'duration'  '110'
                                          'artist'  'Baroness'
                                     'text_people'  ''
                                         'release'  'Red Album'
                                           'title'  'Cockroach En Fleur'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['metal', 'sludge metal', 'post rock', 'progressive metal', 'sludge', 'post "
 "metal']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '05'
                                      'tracktotal'  ''
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'eid-metal-sludge or grind'
                                             'bpm'  '122.437'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Red Album'
'TBPM' (BPM (beats per minute))                     '122.437'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-sludge or grind'
'TDRC' (Recording time)                             '2007'
'TIT2' (Title/songname/content description)         'Cockroach En Fleur'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Baroness'
'TRCK' (Track number/Position in set)               '05'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['metal',
 'sludge metal',
 'post rock',
 'progressive metal',
 'sludge',
 'post metal']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.21 dB'
'TXXX:replaygain_track_peak'                        '0.524285'

========================== row from database ==========================
                                              'id'  1398029
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Baroness/Red Album/Baroness - 05 - Cockroach En Fleur.mp3
                                         'working'  None
                                         'bitrate'  189
                                    'duration_sec'  110
                                           'genre'  eid-metal-sludge or grind
                                        'filesize'  2515434
                                           'mtime'  1620310838
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 05 eid metal sludge or grind
                                      'tag_artist'  Baroness
                                     'tag_release'  Red Album
                                       'tag_title'  Cockroach En Fleur
                                             'bpm'  122.437
                                    'search_title'  'cockroach':1 'en':2 'fleur':3
                                   'search_artist'  'baroness':1
                                  'search_release'  'album':2 'red':1
                                     'search_rest'  '00dwimp':1 '00metal':2 'eid':3 'grind':7 'metal':4 'or':6 'sludge':5
                                    'search_combo'  '00dwimp':7 '00metal':8 'album':6C 'baroness':4B 'cockroach':1A 'eid':9 'en':2A 'fleur':3A 'grind':13 'metal':10 'or':12 'red':5C 'sludge':11
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-4', 'Q-HAP-1', 'q-bass-1', 'q-grit-4']
                                      'lastfmtags'  ['metal', 'sludge metal', 'post rock', 'progressive metal', 'sludge', 'post metal']
                                        'tag_date'  2007
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620310837.687476  (2021-05-06 16:20:37)
                             'size'  2515434