======================== unified (from filesystem) ========================
                                         'bitrate'  '199.695'
                                        'duration'  '1225'
                                          'artist'  'P.D.Q. Bach'
                                     'text_people'  ''
                                         'release'  'The Wurst of P.D.Q Bach (Disc'
                                           'title'  'Half-Act Opera, The Stoned Gue'
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                                      'lastfmtags'  ("['classical satire', 'humor', 'classical', 'untaggedhome', 'pdq bach', "
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                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1986'
                                        'comments'  ''
                                           'genre'  'entertaining-unsorted'
                                             'bpm'  '141.809'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Wurst of P.D.Q Bach (Disc'
'TBPM' (BPM (beats per minute))                     '141.809'
'TCON' (Content type, a.k.a. Genre)                 'entertaining-unsorted'
'TDRC' (Recording time)                             '1986'
'TIT2' (Title/songname/content description)         'Half-Act Opera, The Stoned Gue'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'P.D.Q. Bach'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['classical satire', 'humor', 'classical', 'untaggedhome', 'pdq bach', 'comedy']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.54 dB'
'TXXX:replaygain_track_peak'                        '0.712878'

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00spent/Unsorted/MBZ;#P.D.Q. Bach;#The Wurst of P.D.Q Bach (Disc Two);#02;#Half-Act Opera, _The Stoned Guest_ (highlights).mp3
                                         'working'  None
                                         'bitrate'  199
                                    'duration_sec'  1225
                                           'genre'  entertaining-unsorted
                                        'filesize'  30588591
                                           'mtime'  1620647372
                                   'redo_metaread'  0
                                        'rest_str'   00spent Unsorted MBZ;#P.D.Q. Bach;#The Two);#02;#Half _The Guest_ (highlights) entertaining unsorted
                                      'tag_artist'  P.D.Q. Bach
                                     'tag_release'  The Wurst of P.D.Q Bach (Disc
                                       'tag_title'  Half-Act Opera, The Stoned Gue
                                             'bpm'  141.809
                                    'search_title'  'act':2 'gue':8 'half':1 'halfact':3 'opera':4,5 'stoned':7 'the':6
                                   'search_artist'  'bach':5 'd':2 'p':1 'pdq':4 'q':3
                                  'search_release'  'bach':8 'd':5 'disc':9,10 'of':3 'p':4 'pdq':7 'q':6 'the':1 'wurst':2
                                     'search_rest'  '00spent':1 '02':14,17 'bach':9,11 'd':5 'entertaining':23 'guest':20 'half':15,18 'highlights':21,22 'mbz':3,7 'p':4 'pdq':8 'q':6 'the':10,12,19 'two':13,16 'unsorted':2
                                    'search_combo'  '00spent':24 '02':37,40 'act':2A 'bach':13B,21C,32,34 'd':10B,18C,28 'disc':22C,23C 'entertaining':46 'gue':8A 'guest':43 'half':1A,38,41 'halfact':3A 'highlights':44,45 'mbz':26,30 'of':16C 'opera':4A,5A 'p':9B,17C,27 'pdq':12B,20C,31 'q':11B,19C,29 'stoned':7A 'the':6A,14C,33,35,42 'two':36,39 'unsorted':25 'wurst':15C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['classical satire', 'humor', 'classical', 'untaggedhome', 'pdq bach', 'comedy']
                                        'tag_date'  1986
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1620647371.757428  (2021-05-10 13:49:31)
                             'size'  30588591