======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '193'
                                          'artist'  'Sweet'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1972'
                                           'title'  'Little Willy'
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['glam rock', 'british', '70s', 'rock', 'hard rock', 'classic rock']"
                                     'discogstags'  "['house', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  ''
                                            'date'  '1973'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;rock-cppex;rock-glam;set-pl-billboard'
                                             'bpm'  '125.548'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1972'
'TBPM' (BPM (beats per minute))                     '125.548'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted',
 'rock-cppex',
 'rock-glam',
 'set-pl-billboard']
'TDRC' (Recording time)                             '1973'
'TIT2' (Title/songname/content description)         'Little Willy'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Sweet'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '18'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['house', 'electronic']
'TXXX:lastfmtags'                                   ['glam rock', 'british', '70s', 'rock', 'hard rock', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.34 dB'
'TXXX:replaygain_track_peak'                        '0.545049'

========================== row from database ==========================
                                              'id'  1297146
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1973/018 - Sweet - Little Willy.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  193
                                           'genre'  electronic-generic or radio-unsorted;rock-cppex;rock-glam;set-pl-billboard
                                        'filesize'  3870177
                                           'mtime'  1620737089
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1973 018 electronic generic or radio unsorted;rock cppex;rock glam;set pl billboard
                                      'tag_artist'  Sweet
                                     'tag_release'  Billboard Top Pop Singles of 1972
                                       'tag_title'  Little Willy
                                             'bpm'  125.548
                                    'search_title'  'little':1 'willy':2
                                   'search_artist'  'sweet':1
                                  'search_release'  '1972':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1973':3 'billboard':21 'cppex':12,14 'electronic':4 'generic':5 'glam':16,18 'or':6 'pl':20 'radio':7 'rock':9,11,13,15 'set':17,19 'top100':2 'unsorted':8,10
                                    'search_combo'  '00poprockelectronic':10 '1972':9C '1973':12 'billboard':4C,30 'cppex':21,23 'electronic':13 'generic':14 'glam':25,27 'little':1A 'of':8C 'or':15 'pl':29 'pop':6C 'radio':16 'rock':18,20,22,24 'set':26,28 'singles':7C 'sweet':3B 'top':5C 'top100':11 'unsorted':17,19 'willy':2A
                                    'tag_tracknum'  18
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['glam rock', 'british', '70s', 'rock', 'hard rock', 'classic rock']
                                        'tag_date'  1973
                                     'discogstags'  ['house', 'electronic']

============================== file details ==============================
                                           'mtime'  1620737089.0595953  (2021-05-11 14:44:49)
                             'size'  3870177