======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '118'
                                          'artist'  'The Contenders'
                                     'text_people'  ''
                                         'release'  'Tape No232 - Unchain My Heart'
                                           'title'  'Johnny B. Goode'
                                           '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-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock', 'ska', 'oldies', 'pop punk', 'doo wop']"
                                     'discogstags'  "['novelty', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  ''
                                            'date'  '1964'
                                        'comments'  ''
                                           'genre'  'rock-gr-garage;set-pl-garagetapes'
                                             'bpm'  '121.4'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         'http://garagetapes.blogspot.gr/'
'TALB' (Album/Movie/Show title)                     'Tape No232 - Unchain My Heart'
'TBPM' (BPM (beats per minute))                     '121.4'
'TCON' (Content type, a.k.a. Genre)                 ['rock-gr-garage', 'set-pl-garagetapes']
'TDRC' (Recording time)                             '1964'
'TIT2' (Title/songname/content description)         'Johnny B. Goode'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Contenders'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '13'
'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:country'                                      'US'
'TXXX:discogstags'                                  ['novelty', 'pop']
'TXXX:lastfmtags'                                   ['rock', 'ska', 'oldies', 'pop punk', 'doo wop']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+24.92 dB'
'TXXX:replaygain_track_peak'                        '0.022484'
'TXXX:tracknum'                                     '13'

========================== row from database ==========================
                                              'id'  501161
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/garagetapes.blogspot.com/GT232/13 - The Contenders - Johnny B. Goode (1964 US) (Chattahoochie).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  118
                                           'genre'  rock-gr-garage;set-pl-garagetapes
                                        'filesize'  2913775
                                           'mtime'  1620385423
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm garagetapes.blogspot.com GT232 13 (1964 US) (Chattahoochie) rock gr garage;set pl garagetapes
                                      'tag_artist'  The Contenders
                                     'tag_release'  Tape No232 - Unchain My Heart
                                       'tag_title'  Johnny B. Goode
                                             'bpm'  121.4
                                    'search_title'  'b':2,3 'goode':4 'johnny':1
                                   'search_artist'  'contenders':2 'the':1
                                  'search_release'  'heart':5 'my':4 'no232':2 'tape':1 'unchain':3
                                     'search_rest'  '1964':6,7 'blogspot':2 'chattahoochie':10,11 'com':3 'garage':14,16 'garagetapes':1,19 'garagetapesblogspotcom':4 'gr':13 'gt232':5 'pl':18 'rock':12 'set':15,17 'us':8,9
                                    'search_combo'  '1964':17,18 'b':2A,3A 'blogspot':13 'chattahoochie':21,22 'com':14 'contenders':6B 'garage':25,27 'garagetapes':12,30 'garagetapesblogspotcom':15 'goode':4A 'gr':24 'gt232':16 'heart':11C 'johnny':1A 'my':10C 'no232':8C 'pl':29 'rock':23 'set':26,28 'tape':7C 'the':5B 'unchain':9C 'us':19,20
                                    'tag_tracknum'  13
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-2', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'ska', 'oldies', 'pop punk', 'doo wop']
                                        'tag_date'  1964
                                     'discogstags'  ['novelty', 'pop']

============================== file details ==============================
                                           'mtime'  1620385423.2877955  (2021-05-07 13:03:43)
                             'size'  2913775