======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '141'
                                          'artist'  'Golden Gate Quartet'
                                     'text_people'  ''
                                         'release'  'Complete Recorded Works in Chronological Order, Volume 3: 1939'
                                           'title'  "What's New?"
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 "'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'  '25'
                                      'tracktotal'  '25'
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'loc-namerica-gospel'
                                             'bpm'  '137.199'
                                             'key'  '12A'
                                        'acoustid'  '83949227-cb64-480a-8bb3-890e00bf1c23'
rest: ''

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'TALB' (Album/Movie/Show title)                     'Complete Recorded Works in Chronological Order, Volume 3: 1939'
'TBPM' (BPM (beats per minute))                     '137.199'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-gospel'
'TDOR' (Original release time)                      '1996'
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         "What's New?"
'TKEY' (Initial key)                                '12A'
'TLEN' (Length)                                     '141906'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The Golden Gate Jubilee 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)               '25/25'
'TSO2'                                              'Golden Gate Jubilee Quartet, The'
'TSOP' (Performer sort order)                       'Golden Gate Jubilee Quartet, The'
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'TXXX:MusicBrainz Album Type'                       'compilation'
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'TXXX:Q-LOCALNESS'                                  '3'
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'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'                        '+1.71 dB'
'TXXX:replaygain_track_peak'                        '0.600653'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'20e57542-9f30-430c-8ebc-091ada8480f6')

========================== row from database ==========================
                                              'id'  1509812
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Golden Gate Quartet--Complete Works 1937-44 (Document-5CD)/Vol.3 1939/25 - What_s New.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  141
                                           'genre'  loc-namerica-gospel
                                        'filesize'  2274669
                                           'mtime'  1621627977
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 1937 44 (Document 5CD) Vol.3 25 What_s loc namerica gospel
                                      'tag_artist'  Golden Gate Quartet
                                     'tag_release'  Complete Recorded Works in Chronological Order, Volume 3: 1939
                                       'tag_title'  What's New?
                                             'bpm'  137.199
                                    'search_title'  'new':4 's':2 'what':1 'whats':3
                                   'search_artist'  'gate':2 'golden':1 'quartet':3
                                  'search_release'  '1939':11 '3':9,10 'chronological':5 'complete':1 'in':4 'order':6,7 'recorded':2 'volume':8 'works':3
                                     'search_rest'  '1937':5 '25':14 '3':12 '44':6 '5cd':9,10 'country':4 'document':7,8 'exotica':2 'gospel':19 'jazz':1 'loc':17 'namerica':18 'oldies':3 's':16 'vol':11 'vol3':13 'what':15
                                    'search_combo'  '1937':23 '1939':18C '25':32 '3':16C,17C,30 '44':24 '5cd':27,28 'chronological':12C 'complete':8C 'country':22 'document':25,26 'exotica':20 'gate':6B 'golden':5B 'gospel':37 'in':11C 'jazz':19 'loc':35 'namerica':36 'new':4A 'oldies':21 'order':13C,14C 'quartet':7B 'recorded':9C 's':2A,34 'vol':29 'vol3':31 'volume':15C 'what':1A,33 'whats':3A 'works':10C
                                    'tag_tracknum'  25
                                      'num_images'  0
                                             'key'  12A
                                           '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'  1621627976.7085118  (2021-05-21 22:12:56)
                             'size'  2274669