======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '260'
                                          'artist'  'Ada Jones & Len Spencer'
                                     'text_people'  ''
                                         'release'  'Edison Amberol   410'
                                           'title'  "Ludwig's Air Castle 1910 Edison"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', "
 "'q-play-2', 'Q-JZFKS-1', 'Q-OLDST-1', 'q-chart-1', 'q-drums-1', 'q-other-2', "
 "'q-piano-1', 'q-vocals-4', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['vaudeville', 'musical', 'jewish', 'cylinder', 'early recordings']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1910'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '90.9'
                                             'key'  '9A'
                                        '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 Amberol   410'
'TBPM' (BPM (beats per minute))                     '90.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1910'
'TIT2' (Title/songname/content description)         "Ludwig's Air Castle 1910 Edison"
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ada Jones & Len Spencer'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['vaudeville', 'musical', 'jewish', 'cylinder', 'early recordings']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.21 dB'
'TXXX:replaygain_track_peak'                        '0.726114'

========================== row from database ==========================
                                              'id'  1509057
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1910/Ada Jones & Len Spencer - Ludwig_s Air Castle 1910 Edison.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  260
                                           'genre'  prerock-vocal
                                        'filesize'  5281709
                                           'mtime'  1621088918
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop Ludwig_s prerock vocal
                                      'tag_artist'  Ada Jones & Len Spencer
                                     'tag_release'  Edison Amberol   410
                                       'tag_title'  Ludwig's Air Castle 1910 Edison
                                             'bpm'  90.9
                                    'search_title'  '1910':6 'air':4 'castle':5 'edison':7 'ludwig':1 'ludwigs':3 's':2
                                   'search_artist'  'ada':1 'jones':2 'len':3 'spencer':4
                                  'search_release'  '410':3 'amberol':2 'edison':1
                                     'search_rest'  '00oldiepop':5 'country':4 'exotica':2 'jazz':1 'ludwig':6 'oldies':3 'prerock':8 's':7 'vocal':9
                                    'search_combo'  '00oldiepop':19 '1910':6A '410':14C 'ada':8B 'air':4A 'amberol':13C 'castle':5A 'country':18 'edison':7A,12C 'exotica':16 'jazz':15 'jones':9B 'len':10B 'ludwig':1A,20 'ludwigs':3A 'oldies':17 'prerock':22 's':2A,21 'spencer':11B 'vocal':23
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           '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-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['vaudeville', 'musical', 'jewish', 'cylinder', 'early recordings']
                                        'tag_date'  1910
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621088917.7226896  (2021-05-15 16:28:37)
                             'size'  5281709