======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '402'
                                          'artist'  'Metallica'
                                     'text_people'  ''
                                         'release'  'Garage Inc. - Disc 2'
                                           'title'  'The Small Hours'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-2', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-JZFKS-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-4', 'q-play-2', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'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'  'rock-gr-hard'
                                             'bpm'  '122.141'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Garage Inc. - Disc 2'
'TBPM' (BPM (beats per minute))                     '122.141'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-hard'
'TDRC' (Recording time)                             '1998'
'TIT2' (Title/songname/content description)         'The Small Hours'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Metallica'
'TRCK' (Track number/Position in set)               '02'
'TXXX:Q-HAP'                                        '2'
'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'                                       '4'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.99 dB'
'TXXX:replaygain_track_peak'                        '0.474794'

========================== row from database ==========================
                                              'id'  1344140
                                            'path'  /data/Music/Bulk/00poprockelectronic/Metallica/Metallica - Garage Inc (1998)/Garage Inc (CD2)/Metallica - The Small Hours - 02.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  402
                                           'genre'  rock-gr-hard
                                        'filesize'  6440894
                                           'mtime'  1636902748
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic (1998) (CD2) 02 rock gr hard
                                      'tag_artist'  Metallica
                                     'tag_release'  Garage Inc. - Disc 2
                                       'tag_title'  The Small Hours
                                             'bpm'  122.141
                                    'search_title'  'hours':3 'small':2 'the':1
                                   'search_artist'  'metallica':1
                                  'search_release'  '2':5 'disc':4 'garage':1 'inc':2,3
                                     'search_rest'  '00poprockelectronic':1 '1998':2,3 'cd2':4,5 'gr':7 'hard':8 'rock':6
                                    'search_combo'  '00poprockelectronic':10 '1998':11,12 '2':9C 'cd2':13,14 'disc':8C 'garage':5C 'gr':16 'hard':17 'hours':3A 'inc':6C,7C 'metallica':4B 'rock':15 'small':2A 'the':1A
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-2', 'q-bass-4', 'q-grit-4']
                                      'lastfmtags'  ['hard rock', 'rock', 'thrash metal', 'metal', 'heavy metal']
                                        'tag_date'  1998
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636902747.7016878  (2021-11-14 16:12:27)
                             'size'  6440894