======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '213'
                                          'artist'  'Metallica'
                                     'text_people'  ''
                                         'release'  'Garage Inc. (CD 1)'
                                           'title'  "It's Electric"
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-4', 'q-play-2', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['hard rock', 'rock', 'thrash metal', 'metal', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '02'
                                      'tracktotal'  ''
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'eid-metal-trash'
                                             'bpm'  '121.701'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Garage Inc. (CD 1)'
'TBPM' (BPM (beats per minute))                     '121.701'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-trash'
'TDRC' (Recording time)                             '1998'
'TIT2' (Title/songname/content description)         "It's Electric"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Metallica'
'TRCK' (Track number/Position in set)               '02'
'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:lastfmtags'                                   ['hard rock', 'rock', 'thrash metal', 'metal', 'heavy metal']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.81 dB'
'TXXX:replaygain_track_peak'                        '0.395807'

========================== row from database ==========================
                                              'id'  1501318
                                            'path'  /data/Music/Bulk/00poprockelectronic/Metallica/Metallica - Garage Inc (1998)/Garage Inc (CD1)/Metallica - It_s Electric - 02.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  213
                                           'genre'  eid-metal-trash
                                        'filesize'  3418879
                                           'mtime'  1620311739
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic (1998) (CD1) It_s 02 eid metal trash
                                      'tag_artist'  Metallica
                                     'tag_release'  Garage Inc. (CD 1)
                                       'tag_title'  It's Electric
                                             'bpm'  121.701
                                    'search_title'  'electric':4 'it':1 'its':3 's':2
                                   'search_artist'  'metallica':1
                                  'search_release'  '1':6,7 'cd':4,5 'garage':1 'inc':2,3
                                     'search_rest'  '00poprockelectronic':1 '1998':2,3 'cd1':4,5 'eid':8 'it':6 'metal':9 's':7 'trash':10
                                    'search_combo'  '00poprockelectronic':13 '1':11C,12C '1998':14,15 'cd':9C,10C 'cd1':16,17 'eid':20 'electric':4A 'garage':6C 'inc':7C,8C 'it':1A,18 'its':3A 'metal':21 'metallica':5B 's':2A,19 'trash':22
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-2', 'q-grit-4']
                                      'lastfmtags'  ['hard rock', 'rock', 'thrash metal', 'metal', 'heavy metal']
                                        'tag_date'  1998
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620311738.719008  (2021-05-06 16:35:38)
                             'size'  3418879