======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '199'
                                          'artist'  'Cat Stevens'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1971'
                                           'title'  'Wild World'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-2', 'Q-PLAY-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-vocals-3', 'q-mixbeat-2', "
 "'Q-PIANO-2']")
                                      'lastfmtags'  "['acoustic', 'rock', 'classic rock', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '73'
                                      'tracktotal'  ''
                                            'date'  '1971'
                                        'comments'  ''
                                           'genre'  ('electronic-generic or '
 'radio-unsorted;rock-cppex;ifs-songwriter-folk;ifs-songwriter-rock;set-pl-billboard')
                                             'bpm'  '145.685'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1971'
'TBPM' (BPM (beats per minute))                     '145.685'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted',
 'rock-cppex',
 'ifs-songwriter-folk',
 'ifs-songwriter-rock',
 'set-pl-billboard']
'TDRC' (Recording time)                             '1971'
'TIT2' (Title/songname/content description)         'Wild World'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Cat Stevens'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '73'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['acoustic', 'rock', 'classic rock', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '3'
'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-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.28 dB'
'TXXX:replaygain_track_peak'                        '0.569186'

========================== row from database ==========================
                                              'id'  1355485
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1971/073 - Cat Stevens - Wild World.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  199
                                           'genre'  electronic-generic or radio-unsorted;rock-cppex;ifs-songwriter-folk;ifs-songwriter-rock;set-pl-billboard
                                        'filesize'  3988346
                                           'mtime'  1642256361
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 073 electronic generic radio unsorted;rock cppex;ifs songwriter folk;ifs songwriter rock;set pl billboard
                                      'tag_artist'  Cat Stevens
                                     'tag_release'  Billboard Top Pop Singles of 1971
                                       'tag_title'  Wild World
                                             'bpm'  145.685
                                    'search_title'  'wild':1 'world':2
                                   'search_artist'  'cat':1 'stevens':2
                                  'search_release'  '1971':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 'billboard':24 'cppex':10,12 'electronic':3 'folk':15,17 'generic':4 'ifs':11,13,16,18 'pl':23 'radio':5 'rock':7,9,19,21 'set':20,22 'songwriter':14 'top100':2 'unsorted':6,8
                                    'search_combo'  '00poprockelectronic':11 '1971':10C 'billboard':5C,34 'cat':3B 'cppex':20,22 'electronic':13 'folk':25,27 'generic':14 'ifs':21,23,26,28 'of':9C 'pl':33 'pop':7C 'radio':15 'rock':17,19,29,31 'set':30,32 'singles':8C 'songwriter':24 'stevens':4B 'top':6C 'top100':12 'unsorted':16,18 'wild':1A 'world':2A
                                    'tag_tracknum'  73
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', 'Q-OLDST-2', 'Q-PLAY-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-chart-3', 'q-drums-1', 'q-other-3', 'q-vocals-3', 'q-mixbeat-2', 'Q-PIANO-2']
                                      'lastfmtags'  ['acoustic', 'rock', 'classic rock', 'folk', 'singer songwriter']
                                        'tag_date'  1971
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1642256361.340864  (2022-01-15 15:19:21)
                             'size'  3988346