======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '291'
                                          'artist'  'Chicago'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  '25 Or 6 to 4'
                                           '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'  '61'
                                      'tracktotal'  ''
                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;rock-cppex'
                                             'bpm'  '145.895'
                                             '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))                     '145.895'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'rock-cppex']
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         '25 Or 6 to 4'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Chicago'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '61'
'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'                        '+0.47 dB'
'TXXX:replaygain_track_peak'                        '0.584262'

========================== row from database ==========================
                                              'id'  1316597
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1970/061 - Chicago - 25 Or 6 to 4.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  291
                                           'genre'  rock-cppex-classic;rock-cppex
                                        'filesize'  5834026
                                           'mtime'  1636039116
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1970 061 rock cppex classic;rock cppex
                                      'tag_artist'  Chicago
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  25 Or 6 to 4
                                             'bpm'  145.895
                                    'search_title'  '25':1 '4':5 '6':3 'or':2 'to':4
                                   'search_artist'  'chicago':1
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1970':3 'classic':6,8 'cppex':5 'rock':4,7,9 'top100':2
                                    'search_combo'  '00poprockelectronic':13 '1':12C '1970':15 '25':1A '4':5A '6':3A 'billboard':7C 'chicago':6B 'classic':18,20 'cppex':17 'of':11C 'or':2A 'pop':9C 'rock':16,19,21 'singles':10C 'to':4A 'top':8C 'top100':14
                                    'tag_tracknum'  61
                                      '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'  1970
                                     'discogstags'  ['electronic', 'psy-trance']

============================== file details ==============================
                                           'mtime'  1636039115.9629495  (2021-11-04 16:18:35)
                             'size'  5834026