======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '259'
                                          'artist'  'Quill'
                                     'text_people'  ''
                                         'release'  'Tape No075 - The Surrealist Waltz'
                                           'title'  'Yellow Butterfly'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HAP-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['powerviolence', 'psychedelic rock', 'thrashcore', 'hardcore', 'fastcore']"
                                     'discogstags'  "['grindcore', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'rock-gr-garage;set-pl-garagetapes'
                                             'bpm'  '127.8'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         'http://garagetapes.blogspot.com/'
'TALB' (Album/Movie/Show title)                     'Tape No075 - The Surrealist Waltz'
'TBPM' (BPM (beats per minute))                     '127.8'
'TCON' (Content type, a.k.a. Genre)                 ['rock-gr-garage', 'set-pl-garagetapes']
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         'Yellow Butterfly'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Quill'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '16'
'TXXX:COUNTRY'                                      'US'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['grindcore', 'rock']
'TXXX:lastfmtags'                                   ['powerviolence', 'psychedelic rock', 'thrashcore', 'hardcore', 'fastcore']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+23.69 dB'
'TXXX:replaygain_track_peak'                        '0.037759'
'TXXX:tracknum'                                     '16'

========================== row from database ==========================
                                              'id'  503315
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/garagetapes.blogspot.com/GT075/16 - Quill - Yellow Butterfly (1970 US).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  259
                                           'genre'  rock-gr-garage;set-pl-garagetapes
                                        'filesize'  6426671
                                           'mtime'  1620383502
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm garagetapes.blogspot.com GT075 16 (1970 US) rock gr garage;set pl garagetapes
                                      'tag_artist'  Quill
                                     'tag_release'  Tape No075 - The Surrealist Waltz
                                       'tag_title'  Yellow Butterfly
                                             'bpm'  127.8
                                    'search_title'  'butterfly':2 'yellow':1
                                   'search_artist'  'quill':1
                                  'search_release'  'no075':2 'surrealist':4 'tape':1 'the':3 'waltz':5
                                     'search_rest'  '1970':6,7 'blogspot':2 'com':3 'garage':12,14 'garagetapes':1,17 'garagetapesblogspotcom':4 'gr':11 'gt075':5 'pl':16 'rock':10 'set':13,15 'us':8,9
                                    'search_combo'  '1970':14,15 'blogspot':10 'butterfly':2A 'com':11 'garage':20,22 'garagetapes':9,25 'garagetapesblogspotcom':12 'gr':19 'gt075':13 'no075':5C 'pl':24 'quill':3B 'rock':18 'set':21,23 'surrealist':7C 'tape':4C 'the':6C 'us':16,17 'waltz':8C 'yellow':1A
                                    'tag_tracknum'  16
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['powerviolence', 'psychedelic rock', 'thrashcore', 'hardcore', 'fastcore']
                                        'tag_date'  1970
                                     'discogstags'  ['grindcore', 'rock']

============================== file details ==============================
                                           'mtime'  1620383502.195391  (2021-05-07 12:31:42)
                             'size'  6426671