======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '128'
                                          'artist'  'Golden Gate Quartet'
                                     'text_people'  ''
                                         'release'  'Complete Recorded Works in Chronological Order, Volume 4: 1939-1943'
                                           'title'  'Julius Caesar'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['gospel', 'blues', 'spiritual', 'jazz', 'soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '21'
                                      'tracktotal'  '24'
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'loc-namerica-gospel'
                                             'bpm'  '111.578'
                                             'key'  '4A'
                                        'acoustid'  'be4fc704-975b-47dd-8626-ad23086fa704'
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'Complete Recorded Works in Chronological Order, Volume 4: 1939-1943'
'TBPM' (BPM (beats per minute))                     '111.578'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-gospel'
'TDOR' (Original release time)                      '1996'
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         'Julius Caesar'
'TKEY' (Initial key)                                '4A'
'TLEN' (Length)                                     '129080'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The Golden Gate Quartet'
'TPE2' (Band/orchestra/accompaniment)               'Golden Gate Quartet'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Document Records'
'TRCK' (Track number/Position in set)               '21/24'
'TSO2'                                              'Golden Gate Quartet, The'
'TSOP' (Performer sort order)                       'Golden Gate Quartet, The'
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'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        '3ac646f6-2057-485c-bf7e-205887c81426'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['gospel', 'blues', 'spiritual', 'jazz', 'soul']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'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'                        '+3.03 dB'
'TXXX:replaygain_track_peak'                        '0.670174'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'5786b7e8-6085-4d12-9c98-4a10a6a29143')

========================== row from database ==========================
                                              'id'  763275
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Golden Gate Quartet--Complete Works 1937-44 (Document-5CD)/Vol.4 1939-1943/21 - Julius Caesar.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  128
                                           'genre'  loc-namerica-gospel
                                        'filesize'  2064171
                                           'mtime'  1621627982
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 1937 44 (Document 5CD) Vol.4 21 loc namerica gospel
                                      'tag_artist'  Golden Gate Quartet
                                     'tag_release'  Complete Recorded Works in Chronological Order, Volume 4: 1939-1943
                                       'tag_title'  Julius Caesar
                                             'bpm'  111.578
                                    'search_title'  'caesar':2 'julius':1
                                   'search_artist'  'gate':2 'golden':1 'quartet':3
                                  'search_release'  '1939':11 '19391943':13 '1943':12 '4':9,10 'chronological':5 'complete':1 'in':4 'order':6,7 'recorded':2 'volume':8 'works':3
                                     'search_rest'  '1937':5 '21':14 '4':12 '44':6 '5cd':9,10 'country':4 'document':7,8 'exotica':2 'gospel':17 'jazz':1 'loc':15 'namerica':16 'oldies':3 'vol':11 'vol4':13
                                    'search_combo'  '1937':23 '1939':16C '19391943':18C '1943':17C '21':32 '4':14C,15C,30 '44':24 '5cd':27,28 'caesar':2A 'chronological':10C 'complete':6C 'country':22 'document':25,26 'exotica':20 'gate':4B 'golden':3B 'gospel':35 'in':9C 'jazz':19 'julius':1A 'loc':33 'namerica':34 'oldies':21 'order':11C,12C 'quartet':5B 'recorded':7C 'vol':29 'vol4':31 'volume':13C 'works':8C
                                    'tag_tracknum'  21
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['gospel', 'blues', 'spiritual', 'jazz', 'soul']
                                        'tag_date'  1996
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627982.1523957  (2021-05-21 22:13:02)
                             'size'  2064171