======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '160'
                                          'artist'  'Vandals'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "My Girlfriend's Dead"
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'q-syn-2', "
 "'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', 'q-drums-4', "
 "'q-other-3', 'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['punk rock', 'punk', 'pop punk', 'ska', 'rock']"
                                     'discogstags'  "['indie rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-gr-punk'
                                             'bpm'  '111.455'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '111.455'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-punk'
'TIT2' (Title/songname/content description)         "My Girlfriend's Dead"
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Vandals'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['indie rock', 'rock']
'TXXX:lastfmtags'                                   ['punk rock', 'punk', 'pop punk', 'ska', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'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'                        '+0.56 dB'
'TXXX:replaygain_track_peak'                        '0.396487'

========================== row from database ==========================
                                              'id'  1513976
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Vandals -  My Girlfriend_s Dead.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  160
                                           'genre'  rock-gr-punk
                                        'filesize'  2568654
                                           'mtime'  1636912546
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] Girlfriend_s rock gr punk
                                      'tag_artist'  Vandals
                                     'tag_release'  None
                                       'tag_title'  My Girlfriend's Dead
                                             'bpm'  111.455
                                    'search_title'  'dead':5 'girlfriend':2 'girlfriends':4 'my':1 's':3
                                   'search_artist'  'vandals':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'files':5,6 'girlfriend':7 'gr':10 'loose':3,4 'punk':11 'rock':9 's':8 'unsorted':2
                                    'search_combo'  '00poprockelectronic':7 'dead':5A 'files':11,12 'girlfriend':2A,13 'girlfriends':4A 'gr':16 'loose':9,10 'my':1A 'punk':17 'rock':15 's':3A,14 'unsorted':8 'vandals':6B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['punk rock', 'punk', 'pop punk', 'ska', 'rock']
                                        'tag_date'  
                                     'discogstags'  ['indie rock', 'rock']

============================== file details ==============================
                                           'mtime'  1636912545.6841207  (2021-11-14 18:55:45)
                             'size'  2568654