======================== unified (from filesystem) ========================
                                         'bitrate'  '96.0'
                                        'duration'  '174'
                                          'artist'  'Nick Lucas'
                                     'text_people'  ''
                                         'release'  'Billboard 1928'
                                           'title'  'Without You, Sweetheart'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['guitar', 'all', 'jazz', '20s', 'kattis hall of fame']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '146'
                                      'tracktotal'  ''
                                            'date'  '1928'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '130.146'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         'Debuted 1928 and peaked at #12 on Various Charts. Source: Pop Memories'
'COMM:ID3v1 Comment:XXX'                            'Debuted 1928 and peaked at #'
'TALB' (Album/Movie/Show title)                     'Billboard 1928'
'TBPM' (BPM (beats per minute))                     '130.146'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1928'
'TIT2' (Title/songname/content description)         'Without You, Sweetheart'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Nick Lucas'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '146'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['guitar', 'all', 'jazz', '20s', 'kattis hall of fame']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.52 dB'
'TXXX:replaygain_track_peak'                        '0.593256'

========================== row from database ==========================
                                              'id'  978144
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Billboard 1928/1928_146 - Nick Lucas - Without You, Sweetheart 96 M (2.54).mp3
                                         'working'  None
                                         'bitrate'  96
                                    'duration_sec'  174
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  2093829
                                           'mtime'  1620528249
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 1928_146 96 M (2.54) prerock jb jazz unsorted
                                      'tag_artist'  Nick Lucas
                                     'tag_release'  Billboard 1928
                                       'tag_title'  Without You, Sweetheart
                                             'bpm'  130.146
                                    'search_title'  'sweetheart':4 'without':1 'you':2,3
                                   'search_artist'  'lucas':2 'nick':1
                                  'search_release'  '1928':2 'billboard':1
                                     'search_rest'  '146':6 '1928':5 '2':9 '254':11 '54':10 '96':7 'country':4 'exotica':2 'jazz':1 'jb':13 'm':8 'oldies':3 'prerock':12 'unsorted':14
                                    'search_combo'  '146':14 '1928':8C,13 '2':17 '254':19 '54':18 '96':15 'billboard':7C 'country':12 'exotica':10 'jazz':9 'jb':21 'lucas':6B 'm':16 'nick':5B 'oldies':11 'prerock':20 'sweetheart':4A 'unsorted':22 'without':1A 'you':2A,3A
                                    'tag_tracknum'  146
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['guitar', 'all', 'jazz', '20s', 'kattis hall of fame']
                                        'tag_date'  1928
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528249.3572047  (2021-05-09 04:44:09)
                             'size'  2093829