======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '169'
                                          'artist'  'Andrews Sisters'
                                     'text_people'  ''
                                         'release'  'Decca 24592'
                                           'title'  "I'm Bitin' My Fingernails And Thinking Of You (+ Ernest Tubb)"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['swing', 'jazz', 'female vocalists', 'oldies', '40s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1949'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '104.015'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Decca 24592'
'TBPM' (BPM (beats per minute))                     '104.015'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1949'
'TIT2' (Title/songname/content description)         "I'm Bitin' My Fingernails And Thinking Of You (+ Ernest Tubb)"
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Andrews Sisters'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['swing', 'jazz', 'female vocalists', 'oldies', '40s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.43 dB'
'TXXX:replaygain_track_peak'                        '0.565929'

========================== row from database ==========================
                                              'id'  1517352
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1949/Andrews Sisters - I_m Bitin_ My Fingernails And Thinking Of You (+ Ernest Tubb) -3-1949.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  169
                                           'genre'  prerock-swing
                                        'filesize'  3387186
                                           'mtime'  1620562249
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1949 I_m Bitin_ 3 1949 prerock swing
                                      'tag_artist'  Andrews Sisters
                                     'tag_release'  Decca 24592
                                       'tag_title'  I'm Bitin' My Fingernails And Thinking Of You (+ Ernest Tubb)
                                             'bpm'  104.015
                                    'search_title'  'and':8 'bitin':4,5 'ernest':12 'fingernails':7 'i':1 'im':3 'm':2 'my':6 'of':10 'thinking':9 'tubb':13,14 'you':11
                                   'search_artist'  'andrews':1 'sisters':2
                                  'search_release'  '24592':2 'decca':1
                                     'search_rest'  '00oldiepop':5 '1949':6 '3':10 'bitin':9 'country':4 'exotica':2 'i':7 'jazz':1 'm':8 'oldies':3 'prerock':11 'swing':12
                                    'search_combo'  '00oldiepop':23 '1949':24 '24592':18C '3':28 'and':8A 'andrews':15B 'bitin':4A,5A,27 'country':22 'decca':17C 'ernest':12A 'exotica':20 'fingernails':7A 'i':1A,25 'im':3A 'jazz':19 'm':2A,26 'my':6A 'of':10A 'oldies':21 'prerock':29 'sisters':16B 'swing':30 'thinking':9A 'tubb':13A,14A 'you':11A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', '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-1', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['swing', 'jazz', 'female vocalists', 'oldies', '40s']
                                        'tag_date'  1949
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562248.7386155  (2021-05-09 14:10:48)
                             'size'  3387186