======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '203'
                                          'artist'  'Tony Martin'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "There's A Broken Heart For Every Light On Broadway (+ Pied Pipers)"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['black sabbath', 'heavy metal', 'rock', 'hard rock', '50s', 'classic rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1949'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '135.728'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '135.728'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1949'
'TIT2' (Title/songname/content description)         "There's A Broken Heart For Every Light On Broadway (+ Pied Pipers)"
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Tony Martin'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['black sabbath', 'heavy metal', 'rock', 'hard rock', '50s', 'classic rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'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'                        '+1.28 dB'
'TXXX:replaygain_track_peak'                        '0.474275'

========================== row from database ==========================
                                              'id'  1522335
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1949/Tony Martin - There_s A Broken Heart For Every Light On Broadway (+ Pied Pipers) 1949.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  203
                                           'genre'  prerock-swing
                                        'filesize'  4081477
                                           'mtime'  1620562315
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1949 There_s 1949 prerock swing
                                      'tag_artist'  Tony Martin
                                     'tag_release'  None
                                       'tag_title'  There's A Broken Heart For Every Light On Broadway (+ Pied Pipers)
                                             'bpm'  135.728
                                    'search_title'  'a':4 'broadway':11 'broken':5 'every':8 'for':7 'heart':6 'light':9 'on':10 'pied':12 'pipers':13,14 's':2 'there':1 'theres':3
                                   'search_artist'  'martin':2 'tony':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1949':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 's':8 'swing':10 'there':7
                                    'search_combo'  '00oldiepop':21 '1949':22 'a':4A 'broadway':11A 'broken':5A 'country':20 'every':8A 'exotica':18 'for':7A 'heart':6A 'jazz':17 'light':9A 'martin':16B 'oldies':19 'on':10A 'pied':12A 'pipers':13A,14A 'prerock':25 's':2A,24 'swing':26 'there':1A,23 'theres':3A 'tony':15B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['black sabbath', 'heavy metal', 'rock', 'hard rock', '50s', 'classic rock']
                                        'tag_date'  1949
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620562314.8435664  (2021-05-09 14:11:54)
                             'size'  4081477