======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '251'
                                          'artist'  'Machine Head'
                                     'text_people'  ''
                                         'release'  'The Burning Red'
                                           'title'  'The Blood, The Sweat, The Tears'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['heavy metal', 'metalcore', 'thrash metal', 'metal', 'groove metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '04'
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'eid-metal-trash'
                                             'bpm'  '93.199'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Burning Red'
'TBPM' (BPM (beats per minute))                     '93.199'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-trash'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'The Blood, The Sweat, The Tears'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Machine Head'
'TRCK' (Track number/Position in set)               '04'
'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'                                   ['heavy metal', 'metalcore', 'thrash metal', 'metal', 'groove metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-2.01 dB'
'TXXX:replaygain_track_peak'                        '0.527193'

========================== row from database ==========================
                                              'id'  1391986
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Machine Head Studio Discography @320K (KindMetalRG)/1999 - Machine Head - The Burning Red/04 - The Blood, The Sweat, The Tears.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  251
                                           'genre'  eid-metal-trash
                                        'filesize'  10047488
                                           'mtime'  1620311593
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal Studio Discography @320K (KindMetalRG) 1999 04 eid metal trash
                                      'tag_artist'  Machine Head
                                     'tag_release'  The Burning Red
                                       'tag_title'  The Blood, The Sweat, The Tears
                                             'bpm'  93.199
                                    'search_title'  'blood':2,3 'sweat':4,5 'tears':6 'the':1
                                   'search_artist'  'head':2 'machine':1
                                  'search_release'  'burning':2 'red':3 'the':1
                                     'search_rest'  '00dwimp':1 '00metal':2 '1999':8 '320k':5 'discography':4 'eid':9 'kind':12,13 'kindmetalrg':6,7 'metal':10 'rg':14,15 'studio':3 'trash':11
                                    'search_combo'  '00dwimp':12 '00metal':13 '1999':19 '320k':16 'blood':2A,3A 'burning':10C 'discography':15 'eid':20 'head':8B 'kind':23,24 'kindmetalrg':17,18 'machine':7B 'metal':21 'red':11C 'rg':25,26 'studio':14 'sweat':4A,5A 'tears':6A 'the':1A,9C 'trash':22
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-4', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['heavy metal', 'metalcore', 'thrash metal', 'metal', 'groove metal']
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620311593.2705765  (2021-05-06 16:33:13)
                             'size'  10047488