======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '174'
                                          'artist'  'Golden Gate Quartet'
                                     'text_people'  ''
                                         'release'  'Complete Recorded Works in Chronological Order, Volume 2: 1938-1939'
                                           'title'  'I Heard Zion Moan'
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                                      'lastfmtags'  "['gospel', 'blues', 'spiritual', 'jazz', 'soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  '23'
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'loc-namerica-gospel'
                                             'bpm'  '118.636'
                                             'key'  '8A'
                                        'acoustid'  '6361a998-362e-4bd9-86ac-c3f27b868305'
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======================== rawer (from filesystem) ========================

'COMM::eng'                                         '[mudmashers]'
'COMM:ID3v1 Comment:XXX'                            '[mudmashers]'
'TALB' (Album/Movie/Show title)                     'Complete Recorded Works in Chronological Order, Volume 2: 1938-1939'
'TBPM' (BPM (beats per minute))                     '118.636'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-gospel'
'TDOR' (Original release time)                      '1996'
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         'I Heard Zion Moan'
'TKEY' (Initial key)                                '8A'
'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)               '15/23'
'TSO2'                                              'Golden Gate Jubilee Quartet, The'
'TSOP' (Performer sort order)                       'Golden Gate Jubilee Quartet, The'
'TXXX:Acoustid Id'                                  '6361a998-362e-4bd9-86ac-c3f27b868305'
'TXXX:CATALOGNUMBER'                                'DOCD-5473'
'TXXX:MusicBrainz Album Artist Id'                  'f3a4c085-a8b7-43ea-88a4-62e416d104cd'
'TXXX:MusicBrainz Album Id'                         'a6ad4431-54d6-4650-bd5a-4e3a4463227c'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        'f3a4c085-a8b7-43ea-88a4-62e416d104cd'
'TXXX:Q-HAP'                                        '3'
'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'                                       '2'
'TXXX:q-busy'                                       '2'
'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'                        '+2.81 dB'
'TXXX:replaygain_track_peak'                        '0.837233'
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========================== row from database ==========================
                                              'id'  766287
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Golden Gate Quartet--Complete Works 1937-44 (Document-5CD)/Vol.2 1938-1939/15 I Hear Zion Moan.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  174
                                           'genre'  loc-namerica-gospel
                                        'filesize'  2790630
                                           'mtime'  1621627971
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 1937 44 (Document 5CD) Vol.2 15 loc namerica gospel
                                      'tag_artist'  Golden Gate Quartet
                                     'tag_release'  Complete Recorded Works in Chronological Order, Volume 2: 1938-1939
                                       'tag_title'  I Heard Zion Moan
                                             'bpm'  118.636
                                    'search_title'  'heard':2 'i':1 'moan':4 'zion':3
                                   'search_artist'  'gate':2 'golden':1 'quartet':3
                                  'search_release'  '1938':11 '19381939':13 '1939':12 '2':9,10 'chronological':5 'complete':1 'in':4 'order':6,7 'recorded':2 'volume':8 'works':3
                                     'search_rest'  '1937':5 '2':12 '44':6 '5cd':9,10 'country':4 'document':7,8 'exotica':2 'gospel':16 'jazz':1 'loc':14 'namerica':15 'oldies':3 'vol':11 'vol2':13
                                    'search_combo'  '1937':25 '1938':18C '19381939':20C '1939':19C '2':16C,17C,32 '44':26 '5cd':29,30 'chronological':12C 'complete':8C 'country':24 'document':27,28 'exotica':22 'gate':6B 'golden':5B 'gospel':36 'heard':2A 'i':1A 'in':11C 'jazz':21 'loc':34 'moan':4A 'namerica':35 'oldies':23 'order':13C,14C 'quartet':7B 'recorded':9C 'vol':31 'vol2':33 'volume':15C 'works':10C 'zion':3A
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  8A
                                           '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-1', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['gospel', 'blues', 'spiritual', 'jazz', 'soul']
                                        'tag_date'  1996
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627971.3233507  (2021-05-21 22:12:51)
                             'size'  2790630