======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '191'
                                          'artist'  'Louis Armstrong'
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                                         'release'  'The Essential Recordings 1925-1940 (Vol 1) Heebie Jeebies'
                                           'title'  'I Want A Butter And Egg Man'
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                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  '24'
                                            'date'  '1980'
                                        'comments'  ''
                                           'genre'  'set-th-novelty'
                                             'bpm'  '93.846'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '93.846'
'TCON' (Content type, a.k.a. Genre)                 'set-th-novelty'
'TDRC' (Recording time)                             '1980'
'TENC' (Encoded by)                                 'iTunes v7.5'
'TIT2' (Title/songname/content description)         'I Want A Butter And Egg Man'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Louis Armstrong'
'TRCK' (Track number/Position in set)               '14/24'
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'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'trumpet', 'oldies', 'swing']
'TXXX:q-bass'                                       '1'
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'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
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'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
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========================== row from database ==========================
                                              'id'  763920
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Zimelis [Chow, Baby!]/Louis Armstrong & His Hot Five - I Want A Butter And Egg Man (voc May Alix).mp3
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                                    'duration_sec'  191
                                           'genre'  set-th-novelty
                                        'filesize'  4604605
                                           'mtime'  1620343086
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                                        'rest_str'   00blues jazz exotica oldies country Zimelis [Chow, Baby!] & His Hot Five (voc May Alix) set th novelty
                                      'tag_artist'  Louis Armstrong
                                     'tag_release'  The Essential Recordings 1925-1940 (Vol 1) Heebie Jeebies
                                       'tag_title'  I Want A Butter And Egg Man
                                             'bpm'  93.846
                                    'search_title'  'a':3 'and':5 'butter':4 'egg':6 'i':1 'man':7 'want':2
                                   'search_artist'  'armstrong':2 'louis':1
                                  'search_release'  '1':9,10 '1925':4 '19251940':6 '1940':5 'essential':2 'heebie':11 'jeebies':12 'recordings':3 'the':1 'vol':7,8
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                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'jazz', 'trumpet', 'oldies', 'swing']
                                        'tag_date'  1980
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620343085.65962  (2021-05-07 01:18:05)
                             'size'  4604605