======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '201'
                                          'artist'  'Edward Meeker'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Who Tied The Can On The Old Dog's Tail"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', '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']")
                                      'lastfmtags'  ("['1900s', 'gramophone', 'lesser known yet streamable artists', 'cylinder', "
 "'all']")
                                     'discogstags'  "['pop', 'vocal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1922'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '86.8'
                                             'key'  '1A'
                                        '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))                     '86.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1922-03-31'
'TIT2' (Title/songname/content description)         "Who Tied The Can On The Old Dog's Tail"
'TKEY' (Initial key)                                '1A'
'TLEN' (Length)                                     '201000'
'TPE1' (Lead performer(s)/Soloist(s))               'Edward Meeker'
'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:discogstags'                                  ['pop', 'vocal']
'TXXX:lastfmtags'                                   ['1900s',
 'gramophone',
 'lesser known yet streamable artists',
 'cylinder',
 'all']
'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'                        '+2.77 dB'
'TXXX:replaygain_track_peak'                        '0.575705'

========================== row from database ==========================
                                              'id'  1512639
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1922/Edward Meeker - Who Tied the Can on the Old Dog_s Tail 31-3-1922.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  201
                                           'genre'  prerock-vocal
                                        'filesize'  4088958
                                           'mtime'  1620666378
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1922 the on the Dog_s 31 3 1922 prerock vocal
                                      'tag_artist'  Edward Meeker
                                     'tag_release'  None
                                       'tag_title'  Who Tied The Can On The Old Dog's Tail
                                             'bpm'  86.8
                                    'search_title'  'can':4 'dog':7 'dogs':9 'old':6 'on':5 's':8 'tail':10 'the':3 'tied':2 'who':1
                                   'search_artist'  'edward':1 'meeker':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1922':6 '3':12 '31':11 'country':4 'dog':9 'exotica':2 'jazz':1 'oldies':3 'on':8 'prerock':13 's':10 'the':7 'vocal':14
                                    'search_combo'  '00oldiepop':17 '1922':18 '3':24 '31':23 'can':4A 'country':16 'dog':7A,21 'dogs':9A 'edward':11B 'exotica':14 'jazz':13 'meeker':12B 'old':6A 'oldies':15 'on':5A,20 'prerock':25 's':8A,22 'tail':10A 'the':3A,19 'tied':2A 'vocal':26 'who':1A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  1A
                                           '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-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['1900s', 'gramophone', 'lesser known yet streamable artists', 'cylinder', 'all']
                                        'tag_date'  1922
                                     'discogstags'  ['pop', 'vocal']

============================== file details ==============================
                                           'mtime'  1620666377.8705812  (2021-05-10 19:06:17)
                             'size'  4088958