======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '248'
                                          'artist'  'New York Light Opera Company'
                                     'text_people'  ''
                                         'release'  'Edison Blue Amberol  2861'
                                           'title'  'Iolanthe Airs (Gilbert & Sullivan) (part 2)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1915'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '85.1'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TALB' (Album/Movie/Show title)                     'Edison Blue Amberol  2861'
'TBPM' (BPM (beats per minute))                     '85.1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1915-10'
'TIT2' (Title/songname/content description)         'Iolanthe Airs (Gilbert & Sullivan) (part 2)'
'TKEY' (Initial key)                                '12B'
'TLEN' (Length)                                     '248000'
'TPE1' (Lead performer(s)/Soloist(s))               'New York Light Opera Company'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.36 dB'
'TXXX:replaygain_track_peak'                        '0.553467'

========================== row from database ==========================
                                              'id'  1460281
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1915/New York Light Opera Company - Iolanthe Airs (Gilbert & Sullivan) (part 2) -10-1915.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  248
                                           'genre'  prerock-band
                                        'filesize'  5029702
                                           'mtime'  1620559555
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1915 10 1915 prerock band
                                      'tag_artist'  New York Light Opera Company
                                     'tag_release'  Edison Blue Amberol  2861
                                       'tag_title'  Iolanthe Airs (Gilbert & Sullivan) (part 2)
                                             'bpm'  85.1
                                    'search_title'  '2':9,10 'airs':2 'gilbert':3,4 'iolanthe':1 'part':7,8 'sullivan':5,6
                                   'search_artist'  'company':5 'light':3 'new':1 'opera':4 'york':2
                                  'search_release'  '2861':4 'amberol':3 'blue':2 'edison':1
                                     'search_rest'  '00oldiepop':5 '1915':6 'band':8 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7
                                    'search_combo'  '00oldiepop':24 '1915':25 '2':9A,10A '2861':19C 'airs':2A 'amberol':18C 'band':27 'blue':17C 'company':15B 'country':23 'edison':16C 'exotica':21 'gilbert':3A,4A 'iolanthe':1A 'jazz':20 'light':13B 'new':11B 'oldies':22 'opera':14B 'part':7A,8A 'prerock':26 'sullivan':5A,6A 'york':12B
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  12B
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1915
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559554.8263683  (2021-05-09 13:25:54)
                             'size'  5029702