======================== unified (from filesystem) ========================
                                         'bitrate'  '174.309'
                                        'duration'  '155'
                                          'artist'  'system of a down'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-HAP-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['alternative metal', 'alternative', 'metal', 'nu metal', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'eid-unsorted'
                                             'bpm'  '96.668'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '96.668'
'TCON' (Content type, a.k.a. Genre)                 'eid-unsorted'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'system of a down'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['alternative metal', 'alternative', 'metal', 'nu metal', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.10 dB'
'TXXX:replaygain_track_peak'                        '0.349312'

========================== row from database ==========================
                                              'id'  1313473
                                            'path'  /data/Music/Bulk/00poprockelectronic/System Of A Down/Unknown/System of A Down - Innervi.mp3
                                         'working'  None
                                         'bitrate'  174
                                    'duration_sec'  155
                                           'genre'  eid-unsorted
                                        'filesize'  3389013
                                           'mtime'  1620521332
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic System Of A Down Unknown System A Down Innervi eid unsorted
                                      'tag_artist'  system of a down
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  96.668
                                    'search_title'  None
                                   'search_artist'  'a':3 'down':4 'of':2 'system':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'a':4 'down':5 'eid':8 'innervi':7 'of':3 'system':2 'unknown':6 'unsorted':9
                                    'search_combo'  '00poprockelectronic':5 'a':3B,8 'down':4B,9 'eid':12 'innervi':11 'of':2B,7 'system':1B,6 'unknown':10 'unsorted':13
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-piano-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['alternative metal', 'alternative', 'metal', 'nu metal', 'rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620521331.7228398  (2021-05-09 02:48:51)
                             'size'  3389013