======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '276'
                                          'artist'  'The Dresden Dolls'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Night at the Roses'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-4', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['punk cabaret', 'indie', 'cabaret', 'dark cabaret', 'dresden dolls']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter;ifs-songwriter-eos'
                                             'bpm'  '131.669'
                                             'key'  '3B'
                                        'acoustid'  ''
rest: ''

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

'POPM:\x01ÿþ3'                                      POPM(email='\x01ÿþ3', rating=0, count=0)
'TBPM' (BPM (beats per minute))                     '131.669'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter', 'ifs-songwriter-eos']
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Night at the Roses'
'TKEY' (Initial key)                                '3B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Dresden Dolls'
'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:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['punk cabaret', 'indie', 'cabaret', 'dark cabaret', 'dresden dolls']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '4'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.22 dB'
'TXXX:replaygain_track_peak'                        '0.519331'

========================== row from database ==========================
                                              'id'  1363482
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/00songwriter-eos/Dresden Dolls & Amanda Palmer/Live, misc/Dresden Dolls - Night at the Roses.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  276
                                           'genre'  ifs-songwriter;ifs-songwriter-eos
                                        'filesize'  4422658
                                           'mtime'  1636401352
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 00songwriter eos & Amanda Palmer Live, misc ifs songwriter;ifs songwriter eos
                                      'tag_artist'  The Dresden Dolls
                                     'tag_release'  None
                                       'tag_title'  Night at the Roses
                                             'bpm'  131.669
                                    'search_title'  'at':2 'night':1 'roses':4 'the':3
                                   'search_artist'  'dolls':3 'dresden':2 'the':1
                                  'search_release'  
                                     'search_rest'  '00singer':1 '00songwriter':4 'amanda':5 'eos':3 'ifs':10,12,14 'live':7,8 'misc':9 'palmer':6 'songwriter':2,11,13
                                    'search_combo'  '00singer':8 '00songwriter':11 'amanda':12 'at':2A 'dolls':7B 'dresden':6B 'eos':10 'ifs':17,19,21 'live':14,15 'misc':16 'night':1A 'palmer':13 'roses':4A 'songwriter':9,18,20 'the':3A,5B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-4', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['punk cabaret', 'indie', 'cabaret', 'dark cabaret', 'dresden dolls']
                                        'tag_date'  2000
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1636401351.6761277  (2021-11-08 20:55:51)
                             'size'  4422658