======================== unified (from filesystem) ========================
                                         'bitrate'  '263.731'
                                        'duration'  '159'
                                          'artist'  'Caliban/Heaven Shall Burn'
                                     'text_people'  ''
                                         'release'  'The Split Program, Vol. 2'
                                           'title'  'If This Is a Man'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-4', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['metalcore', 'hardcore', 'metal', 'german', 'german metalcore']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'eid-metal'
                                             'bpm'  '80'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'The Split Program, Vol. 2'
'TBPM' (BPM (beats per minute))                     '80'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal'
'TDRC' (Recording time)                             '2005'
'TIT2' (Title/songname/content description)         'If This Is a Man'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Heaven Shall Burn'
'TPE2' (Band/orchestra/accompaniment)               'Caliban/Heaven Shall Burn'
'TPUB' (Publisher)                                  'Lifeforce'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['metalcore', 'hardcore', 'metal', 'german', 'german metalcore']
'TXXX:q-bass'                                       '2'
'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'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.65 dB'
'TXXX:replaygain_track_peak'                        '0.328259'

========================== row from database ==========================
                                              'id'  1323673
                                            'path'  /data/Music/Bulk/00poprockelectronic/Heaven Shall Burn/The Split Program, Vol. 2/Heaven Shall Burn-The Split Program, Vol. 2-If This Is a Man.mp3
                                         'working'  None
                                         'bitrate'  263
                                    'duration_sec'  159
                                           'genre'  eid-metal
                                        'filesize'  5249776
                                           'mtime'  1620301766
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic eid metal
                                      'tag_artist'  Caliban/Heaven Shall Burn
                                     'tag_release'  The Split Program, Vol. 2
                                       'tag_title'  If This Is a Man
                                             'bpm'  80.0
                                    'search_title'  'a':4 'if':1 'is':3 'man':5 'this':2
                                   'search_artist'  'burn':5 'caliban':1 'calibanheaven':3 'heaven':2 'shall':4
                                  'search_release'  '2':7 'program':3,4 'split':2 'the':1 'vol':5,6
                                     'search_rest'  '00poprockelectronic':1 'eid':2 'metal':3
                                    'search_combo'  '00poprockelectronic':18 '2':17C 'a':4A 'burn':10B 'caliban':6B 'calibanheaven':8B 'eid':19 'heaven':7B 'if':1A 'is':3A 'man':5A 'metal':20 'program':13C,14C 'shall':9B 'split':12C 'the':11C 'this':2A 'vol':15C,16C
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', '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-3', 'q-other-3', 'Q-HAP-1', 'q-bass-2', 'q-grit-4']
                                      'lastfmtags'  ['metalcore', 'hardcore', 'metal', 'german', 'german metalcore']
                                        'tag_date'  2005
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620301766.4356904  (2021-05-06 13:49:26)
                             'size'  5249776