======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '74'
                                          'artist'  'Tom Lehrer'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'The Subway Song'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'Q-LOCALNESS-2', 'Q-PLAY-2', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-1', 'q-other-2', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['humor', 'piano', 'comedy', 'satire', 'funny']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'entertaining-comedians'
                                             'bpm'  '132.531'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '132.531'
'TCON' (Content type, a.k.a. Genre)                 'entertaining-comedians'
'TIT2' (Title/songname/content description)         'The Subway Song'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Tom Lehrer'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['humor', 'piano', 'comedy', 'satire', 'funny']
'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'                                      '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.70 dB'
'TXXX:replaygain_track_peak'                        '0.593571'

========================== row from database ==========================
                                              'id'  1358191
                                            'path'  /data/Music/Bulk/00spent/Tom Lehrer/01 - The Subway Song.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  74
                                           'genre'  entertaining-comedians
                                        'filesize'  1194233
                                           'mtime'  1620647365
                                   'redo_metaread'  0
                                        'rest_str'   00spent 01 entertaining comedians
                                      'tag_artist'  Tom Lehrer
                                     'tag_release'  None
                                       'tag_title'  The Subway Song
                                             'bpm'  132.531
                                    'search_title'  'song':3 'subway':2 'the':1
                                   'search_artist'  'lehrer':2 'tom':1
                                  'search_release'  
                                     'search_rest'  '00spent':1 'comedians':3 'entertaining':2
                                    'search_combo'  '00spent':6 'comedians':8 'entertaining':7 'lehrer':5B 'song':3A 'subway':2A 'the':1A 'tom':4B
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['humor', 'piano', 'comedy', 'satire', 'funny']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620647365.4857028  (2021-05-10 13:49:25)
                             'size'  1194233