======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '263'
                                          'artist'  'Leonard Cohen'
                                     'text_people'  'Leonard Cohen'
                                         'release'  'The Best'
                                           'title'  'The Law'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'canadian', 'rock', 'folk', 'singer songwriter']"
                                     'discogstags'  "['folk rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '09'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '108.996'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'MCDI' (Music CD identifier)                        MCDI(data=b'\x01\xff\xfe\x00\x00')
'PRIV:\x01ÿþ:\x00'                                  PRIV(owner='\x01ÿþ', data=b'\x00')
'TALB' (Album/Movie/Show title)                     'The Best'
'TBPM' (BPM (beats per minute))                     '108.996'
'TCOM' (Composer)                                   'Leonard Cohen'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'The Law'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Leonard Cohen'
'TPE2' (Band/orchestra/accompaniment)               'Leonard Cohen'
'TPUB' (Publisher)                                  'Columbia'
'TRCK' (Track number/Position in set)               '09'
'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'                                  ['folk rock', 'rock']
'TXXX:lastfmtags'                                   ['blues', 'canadian', 'rock', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.92 dB'
'TXXX:replaygain_track_peak'                        '0.549131'

========================== row from database ==========================
                                              'id'  1257463
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/More Best of Leonard Cohen/09 - The Law.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  263
                                           'genre'  ifs-songwriter
                                        'filesize'  10560236
                                           'mtime'  1622658727
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos More of 09 ifs songwriter
                                      'tag_artist'  Leonard Cohen
                                     'tag_release'  The Best
                                       'tag_title'  The Law
                                             'bpm'  108.996
                                    'search_title'  'law':2 'the':1
                                   'search_artist'  'cohen':2 'leonard':1
                                  'search_release'  'best':2 'the':1
                                     'search_rest'  '00singer':1 'eos':3 'ifs':6 'more':4 'of':5 'songwriter':2
                                    'search_combo'  '00singer':7 'best':6C 'cohen':4B 'eos':9 'ifs':12 'law':2A 'leonard':3B 'more':10 'of':11 'songwriter':8 'the':1A,5C
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'canadian', 'rock', 'folk', 'singer songwriter']
                                        'tag_date'  2000
                                     'discogstags'  ['folk rock', 'rock']

============================== file details ==============================
                                           'mtime'  1622658726.9164486  (2021-06-02 20:32:06)
                             'size'  10560236