======================== unified (from filesystem) ========================
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                                        'duration'  '189'
                                          'artist'  'Howlin Wolf'
                                     'text_people'  ''
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                                           'title'  'Going Down Slow'
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                                      'lastfmtags'  "['blues', 'chicago blues', 'classic blues', 'delta blues', 'rhythm and blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '2014'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '144.955'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '144.955'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '2014'
'TIT2' (Title/songname/content description)         'Going Down Slow'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Howlin Wolf'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
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'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['blues', 'chicago blues', 'classic blues', 'delta blues', 'rhythm and blues']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.81 dB'
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========================== row from database ==========================
                                              'id'  948530
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/va - Slow Grind Fever Vol. 4 - More Adventures In The Sleazy World Of Popcorn Noir (2014)/10.Howlin Wolf - Going Down Slow.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  189
                                           'genre'  prerock-jb-blues
                                        'filesize'  7601558
                                           'mtime'  1620402863
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country va 10.Howlin prerock jb blues
                                      'tag_artist'  Howlin Wolf
                                     'tag_release'  Slow Grind Fever Vol. 4 - More Adventures In The Sleazy World Of Popcorn Noir (2014)
                                       'tag_title'  Going Down Slow
                                             'bpm'  144.955
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                                   'search_artist'  'howlin':1 'wolf':2
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                                     'search_rest'  '10':6 '10howlin':8 'blues':11 'country':4 'exotica':2 'howlin':7 'jazz':1 'jb':10 'oldies':3 'prerock':9 'va':5
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                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-2', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'chicago blues', 'classic blues', 'delta blues', 'rhythm and blues']
                                        'tag_date'  2014
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620402863.0940292  (2021-05-07 17:54:23)
                             'size'  7601558