======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '152'
                                          'artist'  'Esquivel'
                                     'text_people'  ''
                                         'release'  'Space Age Bachelor Pad Music'
                                           'title'  'Harlem Nocturne'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['lounge', 'space age pop', 'exotica', 'latin', 'easy listening']"
                                     'discogstags'  "['space-age', 'jazz', 'latin jazz', 'latin', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-lounge or exotica or bossa'
                                             'bpm'  '139.9'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Space Age Bachelor Pad Music'
'TBPM' (BPM (beats per minute))                     '139.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-lounge or exotica or bossa'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Harlem Nocturne'
'TKEY' (Initial key)                                '4A'
'TLEN' (Length)                                     '152920'
'TPE1' (Lead performer(s)/Soloist(s))               'Esquivel'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '9'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['space-age', 'jazz', 'latin jazz', 'latin', 'easy listening']
'TXXX:lastfmtags'                                   ['lounge', 'space age pop', 'exotica', 'latin', 'easy listening']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.64 dB'
'TXXX:replaygain_track_peak'                        '0.564122'

========================== row from database ==========================
                                              'id'  746311
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/va - space age pop & mid century domestics (jingles & themes)/(1960) esquivel - harlem nocturne.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  152
                                           'genre'  prerock-jb-jazz-lounge or exotica or bossa
                                        'filesize'  3680340
                                           'mtime'  1620539373
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm va space age pop & mid century domestics (jingles & themes) (1960) esquivel harlem nocturne prerock jb jazz lounge exotica bossa
                                      'tag_artist'  Esquivel
                                     'tag_release'  Space Age Bachelor Pad Music
                                       'tag_title'  Harlem Nocturne
                                             'bpm'  139.9
                                    'search_title'  'harlem':1 'nocturne':2
                                   'search_artist'  'esquivel':1
                                  'search_release'  'age':2 'bachelor':3 'music':5 'pad':4 'space':1
                                     'search_rest'  '1960':12,13 'age':3 'bossa':22 'century':6 'domestics':7 'esquivel':14 'exotica':21 'harlem':15 'jazz':19 'jb':18 'jingles':8,9 'lounge':20 'mid':5 'nocturne':16 'pop':4 'prerock':17 'space':2 'themes':10,11 'va':1
                                    'search_combo'  '1960':20,21 'age':5C,11 'bachelor':6C 'bossa':30 'century':14 'domestics':15 'esquivel':3B,22 'exotica':29 'harlem':1A,23 'jazz':27 'jb':26 'jingles':16,17 'lounge':28 'mid':13 'music':8C 'nocturne':2A,24 'pad':7C 'pop':12 'prerock':25 'space':4C,10 'themes':18,19 'va':9
                                    'tag_tracknum'  9
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['lounge', 'space age pop', 'exotica', 'latin', 'easy listening']
                                        'tag_date'  1960
                                     'discogstags'  ['space-age', 'jazz', 'latin jazz', 'latin', 'easy listening']

============================== file details ==============================
                                           'mtime'  1620539373.3986344  (2021-05-09 07:49:33)
                             'size'  3680340