======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '293'
                                          'artist'  'Foo Fighters'
                                     'text_people'  ''
                                         'release'  'B-Sides (Disc 2)'
                                           'title'  'How I Miss You'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['alternative rock', 'alternative', 'hard rock', 'grunge', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '141.216'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'B-Sides (Disc 2)'
'TBPM' (BPM (beats per minute))                     '141.216'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TIT2' (Title/songname/content description)         'How I Miss You'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Foo Fighters'
'TRCK' (Track number/Position in set)               '15'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['alternative rock', 'alternative', 'hard rock', 'grunge', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.82 dB'
'TXXX:replaygain_track_peak'                        '0.439986'

========================== row from database ==========================
                                              'id'  1307524
                                            'path'  /data/Music/Bulk/00poprockelectronic/Foo Fighters/cifs81ef.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  293
                                           'genre'  rock-unsorted
                                        'filesize'  4109805
                                           'mtime'  1676053202
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic cifs81ef rock unsorted
                                      'tag_artist'  Foo Fighters
                                     'tag_release'  B-Sides (Disc 2)
                                       'tag_title'  How I Miss You
                                             'bpm'  141.216
                                    'search_title'  'how':1 'i':2 'miss':3 'you':4
                                   'search_artist'  'fighters':2 'foo':1
                                  'search_release'  '2':6,7 'b':1 'bsides':3 'disc':4,5 'sides':2
                                     'search_rest'  '00poprockelectronic':1 'cifs81ef':2 'rock':3 'unsorted':4
                                    'search_combo'  '00poprockelectronic':14 '2':12C,13C 'b':7C 'bsides':9C 'cifs81ef':15 'disc':10C,11C 'fighters':6B 'foo':5B 'how':1A 'i':2A 'miss':3A 'rock':16 'sides':8C 'unsorted':17 'you':4A
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HAP-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-4', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-1']
                                      'lastfmtags'  ['alternative rock', 'alternative', 'hard rock', 'grunge', 'rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1676053201.5866191  (2023-02-10 19:20:01)
                             'size'  4109805