======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '197'
                                          'artist'  'Blind Willie Johnson'
                                     'text_people'  ''
                                         'release'  'Doom & Gloom - Early Songs of Angst & Disaster, 1927-1945'
                                           'title'  'Dark Was the Night, Cold Was the Ground'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-OLDST-1', 'Q-HHRNBTT-1', "
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                                      'lastfmtags'  "['blues', 'classic blues', 'delta blues', 'folk', 'gospel']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '24'
                                      'tracktotal'  '24'
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '141.7'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Doom & Gloom - Early Songs of Angst & Disaster, 1927-1945'
'TBPM' (BPM (beats per minute))                     '141.7'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '2008-01-22'
'TENC' (Encoded by)                                 'Lame 3.97'
'TIT2' (Title/songname/content description)         'Dark Was the Night, Cold Was the Ground'
'TKEY' (Initial key)                                '8A'
'TLAN' (Language(s))                                'English'
'TPE1' (Lead performer(s)/Soloist(s))               'Blind Willie Johnson'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Trikont'
'TRCK' (Track number/Position in set)               '24/24'
'TSOP' (Performer sort order)                       'Johnson, Blind Willie'
'TXXX:ALBUMARTISTSORT'                              'Various Artists'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '30999223-1fe4-46be-b032-9394c4644d7f'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        '8a14c00b-4779-44e4-9b2e-4cc9dcd92e9b'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['blues', 'classic blues', 'delta blues', 'folk', 'gospel']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+2.53 dB'
'TXXX:replaygain_track_peak'                        '0.376027'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'b11f52ca-6261-408c-815f-dd76d0aa3cb5')

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/doom & gloom - early songs of angst & disaster, 1927-1945/24 - Blind Willie Johnson - Dark Was the Night, Cold Was the Ground.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  197
                                           'genre'  loc-namerica-country
                                        'filesize'  3168256
                                           'mtime'  1621626213
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm doom gloom early songs angst disaster, 24 loc namerica country
                                      'tag_artist'  Blind Willie Johnson
                                     'tag_release'  Doom & Gloom - Early Songs of Angst & Disaster, 1927-1945
                                       'tag_title'  Dark Was the Night, Cold Was the Ground
                                             'bpm'  141.7
                                    'search_title'  'cold':6 'dark':1 'ground':7 'night':4,5 'the':3 'was':2
                                   'search_artist'  'blind':1 'johnson':3 'willie':2
                                  'search_release'  '1927':9 '19271945':11 '1945':10 'angst':6 'disaster':7,8 'doom':1 'early':3 'gloom':2 'of':5 'songs':4
                                     'search_rest'  '24':8 'angst':5 'country':11 'disaster':6,7 'doom':1 'early':3 'gloom':2 'loc':9 'namerica':10 'songs':4
                                    'search_combo'  '1927':19C '19271945':21C '1945':20C '24':29 'angst':16C,26 'blind':8B 'cold':6A 'country':32 'dark':1A 'disaster':17C,18C,27,28 'doom':11C,22 'early':13C,24 'gloom':12C,23 'ground':7A 'johnson':10B 'loc':30 'namerica':31 'night':4A,5A 'of':15C 'songs':14C,25 'the':3A 'was':2A 'willie':9B
                                    'tag_tracknum'  24
                                      '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-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'classic blues', 'delta blues', 'folk', 'gospel']
                                        'tag_date'  2008
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1621626213.0344758  (2021-05-21 21:43:33)
                             'size'  3168256