======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '148'
                                          'artist'  'Beach Boys'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1963'
                                           'title'  "Surfin' USA"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['60s', 'classic rock', 'pop', 'surf', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1963'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;set-pl-billboard'
                                             'bpm'  '105.258'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1963'
'TBPM' (BPM (beats per minute))                     '105.258'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'set-pl-billboard']
'TDRC' (Recording time)                             '1963'
'TIT2' (Title/songname/content description)         "Surfin' USA"
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Beach Boys'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['60s', 'classic rock', 'pop', 'surf', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.86 dB'
'TXXX:replaygain_track_peak'                        '0.542266'

========================== row from database ==========================
                                              'id'  1519733
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1963/002 - Beach Boys - Surfin_ USA.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  148
                                           'genre'  rock-cppex-classic;set-pl-billboard
                                        'filesize'  2381252
                                           'mtime'  1636039110
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 002 Surfin_ rock cppex classic;set pl billboard
                                      'tag_artist'  Beach Boys
                                     'tag_release'  Billboard Top Pop Singles of 1963
                                       'tag_title'  Surfin' USA
                                             'bpm'  105.258
                                    'search_title'  'surfin':1,2 'usa':3
                                   'search_artist'  'beach':1 'boys':2
                                  'search_release'  '1963':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 'billboard':11 'classic':6,8 'cppex':5 'pl':10 'rock':4 'set':7,9 'surfin':3 'top100':2
                                    'search_combo'  '00poprockelectronic':12 '1963':11C 'beach':4B 'billboard':6C,22 'boys':5B 'classic':17,19 'cppex':16 'of':10C 'pl':21 'pop':8C 'rock':15 'set':18,20 'singles':9C 'surfin':1A,2A,14 'top':7C 'top100':13 'usa':3A
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['60s', 'classic rock', 'pop', 'surf', 'rock']
                                        'tag_date'  1963
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636039110.4423695  (2021-11-04 16:18:30)
                             'size'  2381252