======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '268'
                                          'artist'  'Chicago'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  "(I've Been) Searchin' So Long"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'rock', 'pop', '70s', 'classic rock']"
                                     'discogstags'  "['electronic', 'psy-trance']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '73'
                                      'tracktotal'  ''
                                            'date'  '1974'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;rock-cppex;set-pl-billboard'
                                             'bpm'  '120.758'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1'
'TBPM' (BPM (beats per minute))                     '120.758'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'rock-cppex', 'set-pl-billboard']
'TDRC' (Recording time)                             '1974'
'TIT2' (Title/songname/content description)         "(I've Been) Searchin' So Long"
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Chicago'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '73'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electronic', 'psy-trance']
'TXXX:lastfmtags'                                   ['80s', 'rock', 'pop', '70s', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.21 dB'
'TXXX:replaygain_track_peak'                        '0.622384'

========================== row from database ==========================
                                              'id'  1497517
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1974/073 - Chicago - (I_ve Been) Searchin_ So Long.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  268
                                           'genre'  rock-cppex-classic;rock-cppex;set-pl-billboard
                                        'filesize'  5379785
                                           'mtime'  1636039116
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1974 073 (I_ve Searchin_ rock cppex classic;rock cppex;set pl billboard
                                      'tag_artist'  Chicago
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  (I've Been) Searchin' So Long
                                             'bpm'  120.758
                                    'search_title'  'been':4,5 'i':1 'ive':3 'long':9 'searchin':6,7 'so':8 've':2
                                   'search_artist'  'chicago':1
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1974':3 'billboard':20 'classic':11,13 'cppex':10,15,17 'i':4,6 'pl':19 'rock':9,12,14 'searchin':8 'set':16,18 'top100':2 've':5,7
                                    'search_combo'  '00poprockelectronic':17 '1':16C '1974':19 'been':4A,5A 'billboard':11C,36 'chicago':10B 'classic':27,29 'cppex':26,31,33 'i':1A,20,22 'ive':3A 'long':9A 'of':15C 'pl':35 'pop':13C 'rock':25,28,30 'searchin':6A,7A,24 'set':32,34 'singles':14C 'so':8A 'top':12C 'top100':18 've':2A,21,23
                                    'tag_tracknum'  73
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'rock', 'pop', '70s', 'classic rock']
                                        'tag_date'  1974
                                     'discogstags'  ['electronic', 'psy-trance']

============================== file details ==============================
                                           'mtime'  1636039116.0250657  (2021-11-04 16:18:36)
                             'size'  5379785