======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '221'
                                          'artist'  'Alien Ant Farm'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Smooth Criminal'
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-UNU-2', 'Q-OLDST-3', 'Q-LOCALNESS-1', "
 "'q-syn-2', 'q-bass-2', '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 rock', 'alternative', 'punk', 'punk rock', 'rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '128.904'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '128.904'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TIT2' (Title/songname/content description)         'Smooth Criminal'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Alien Ant Farm'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['alternative rock', 'alternative', 'punk', 'punk rock', 'rock']
'TXXX:q-bass'                                       '2'
'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'                        '-0.81 dB'
'TXXX:replaygain_track_peak'                        '0.563518'

========================== row from database ==========================
                                              'id'  1295264
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Alien Ant Farm - Smooth Criminal.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  221
                                           'genre'  rock-unsorted
                                        'filesize'  3553280
                                           'mtime'  1620392292
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] rock unsorted
                                      'tag_artist'  Alien Ant Farm
                                     'tag_release'  None
                                       'tag_title'  Smooth Criminal
                                             'bpm'  128.904
                                    'search_title'  'criminal':2 'smooth':1
                                   'search_artist'  'alien':1 'ant':2 'farm':3
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'files':5,6 'loose':3,4 'rock':7 'unsorted':2
                                    'search_combo'  '00poprockelectronic':6 'alien':3B 'ant':4B 'criminal':2A 'farm':5B 'files':10,11 'loose':8,9 'rock':12 'smooth':1A 'unsorted':7
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['alternative rock', 'alternative', 'punk', 'punk rock', 'rock']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620392291.939002  (2021-05-07 14:58:11)
                             'size'  3553280