======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '149'
                                          'artist'  'Calexico'
                                     'text_people'  'J. Convertino'
                                         'release'  'The Black Light'
                                           'title'  'Old Man Waltz'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['indie', 'instrumental', 'alt country', 'folk', 'rock']"
                                     'discogstags'  "['rock', 'folk rock', 'post rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie-unsorted;rock-pop-indie'
                                             'bpm'  '136.092'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            '17+340F181F12C5A66EF91E20FFC'
'COMM:iTunNORM:eng'                                 (' 00000217 00000273 000004E3 0000082B 0000EA77 000186B7 0000443D 00003CEE '
 '0000C37E 0000EA8E')
'COMM:iTunes_CDDB_IDs:eng'                          '17+340F181F12C5A66EF91E20FFCA01278C+514283'
'TALB' (Album/Movie/Show title)                     'The Black Light'
'TBPM' (BPM (beats per minute))                     '136.092'
'TCOM' (Composer)                                   'J. Convertino'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter-indie-unsorted', 'rock-pop-indie']
'TDRC' (Recording time)                             '1998'
'TENC' (Encoded by)                                 'iTunes v4.2'
'TIT2' (Title/songname/content description)         'Old Man Waltz'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Calexico'
'TPE2' (Band/orchestra/accompaniment)               'Calexico'
'TPOS' (Part of a set)                              '1/1'
'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:discogstags'                                  ['rock', 'folk rock', 'post rock']
'TXXX:lastfmtags'                                   ['indie', 'instrumental', 'alt country', 'folk', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.89 dB'
'TXXX:replaygain_track_peak'                        '0.725238'

========================== row from database ==========================
                                              'id'  1247778
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Calexico/[1998] The Black Light/15 Old Man Waltz.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  149
                                           'genre'  ifs-songwriter-indie-unsorted;rock-pop-indie
                                        'filesize'  6367863
                                           'mtime'  1637950092
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos [1998] 15 ifs songwriter indie unsorted;rock pop indie
                                      'tag_artist'  Calexico
                                     'tag_release'  The Black Light
                                       'tag_title'  Old Man Waltz
                                             'bpm'  136.092
                                    'search_title'  'man':2 'old':1 'waltz':3
                                   'search_artist'  'calexico':1
                                  'search_release'  'black':2 'light':3 'the':1
                                     'search_rest'  '00singer':1 '1998':4,5 'eos':3 'ifs':6 'indie':7 'pop':12 'rock':9,11 'songwriter':2 'unsorted':8,10
                                    'search_combo'  '00singer':8 '1998':11,12 'black':6C 'calexico':4B 'eos':10 'ifs':13 'indie':14 'light':7C 'man':2A 'old':1A 'pop':19 'rock':16,18 'songwriter':9 'the':5C 'unsorted':15,17 'waltz':3A
                                    'tag_tracknum'  15
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-4', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'instrumental', 'alt country', 'folk', 'rock']
                                        'tag_date'  1998
                                     'discogstags'  ['rock', 'folk rock', 'post rock']

============================== file details ==============================
                                           'mtime'  1637950092.4650736  (2021-11-26 19:08:12)
                             'size'  6367863