======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '165'
                                          'artist'  'Dorsey Brothers'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "It's Dark On Observatory Hill (vocal - Bob Crosby)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['swing jazz', 'jazz band old', 'big band', 'lesser known yet streamable "
 "artists', 'all']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '123.2'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '123.2'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1935-11-15'
'TIT2' (Title/songname/content description)         "It's Dark On Observatory Hill (vocal - Bob Crosby)"
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '165000'
'TPE1' (Lead performer(s)/Soloist(s))               'Dorsey Brothers'
'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'                                   ['swing jazz',
 'jazz band old',
 'big band',
 'lesser known yet streamable artists',
 'all']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.03 dB'
'TXXX:replaygain_track_peak'                        '0.630161'

========================== row from database ==========================
                                              'id'  1503270
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1935/Dorsey Brothers - It_s Dark On Observatory Hill (vocal - Bob Crosby) 15-11-1935.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  165
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  3364175
                                           'mtime'  1620526198
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1935 It_s 15 11 1935 prerock jb jazz unsorted
                                      'tag_artist'  Dorsey Brothers
                                     'tag_release'  None
                                       'tag_title'  It's Dark On Observatory Hill (vocal - Bob Crosby)
                                             'bpm'  123.2
                                    'search_title'  'bob':10 'crosby':11,12 'dark':4 'hill':7 'it':1 'its':3 'observatory':6 'on':5 's':2 'vocal':8,9
                                   'search_artist'  'brothers':2 'dorsey':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1935':6 'country':4 'exotica':2 'it':7 'jazz':1 'jb':10 'oldies':3 'prerock':9 's':8 'unsorted':11
                                    'search_combo'  '00oldiepop':19 '1935':20 'bob':10A 'brothers':14B 'country':18 'crosby':11A,12A 'dark':4A 'dorsey':13B 'exotica':16 'hill':7A 'it':1A,21 'its':3A 'jazz':15 'jb':24 'observatory':6A 'oldies':17 'on':5A 'prerock':23 's':2A,22 'unsorted':25 'vocal':8A,9A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['swing jazz', 'jazz band old', 'big band', 'lesser known yet streamable artists', 'all']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620526197.7358775  (2021-05-09 04:09:57)
                             'size'  3364175