======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '114'
                                          'artist'  'The Buttons'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Foot Stompin' U.S.A"
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['minimal synth', '70s', 'hard rock', 'psychedelia', 'psychedelic']"
                                     'discogstags'  "['funk / soul', 'psychedelic rock', 'funk', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  '31'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-pl-spelling'
                                             'bpm'  '134.735'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 000015AD 00001612 0000689C 0000633D 00000F00 00000F00 0000756C 000072FA '
 '000170E0 000170E0')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 0000084C 00000000004E8D24 00000000 002AB1CC 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_1:eng'                            'BD10D81F+323575+31+150+10780+19976+30083+42706+52453+63436+72058+82555+91643+103866+115589+128605+141208+152226+163540+173988+182743+191759+202091+211626+219715+229189+238252+248710+259129+267285+278142+290061+301438+312047'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '17'
'TBPM' (BPM (beats per minute))                     '134.735'
'TCON' (Content type, a.k.a. Genre)                 'set-pl-spelling'
'TENC' (Encoded by)                                 'iTunes 9.2.1'
'TIT2' (Title/songname/content description)         "Foot Stompin' U.S.A"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Buttons'
'TRCK' (Track number/Position in set)               '17/31'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['funk / soul', 'psychedelic rock', 'funk', 'rock']
'TXXX:lastfmtags'                                   ['minimal synth', '70s', 'hard rock', 'psychedelia', 'psychedelic']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.70 dB'
'TXXX:replaygain_track_peak'                        '0.399892'

========================== row from database ==========================
                                              'id'  1502506
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/spelling/The Buttons - Foot Stompin_ U.S.A.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  114
                                           'genre'  set-pl-spelling
                                        'filesize'  2755731
                                           'mtime'  1620356414
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes spelling Stompin_ set pl spelling
                                      'tag_artist'  The Buttons
                                     'tag_release'  None
                                       'tag_title'  Foot Stompin' U.S.A
                                             'bpm'  134.735
                                    'search_title'  'a':6 'foot':1 's':5 'stompin':2,3 'u':4 'usa':7
                                   'search_artist'  'buttons':2 'the':1
                                  'search_release'  
                                     'search_rest'  '0novelty':2 '0playlists':1 'pl':7 'set':6 'spelling':4 'stompin':5 'themes':3
                                    'search_combo'  '0novelty':11 '0playlists':10 'a':6A 'buttons':9B 'foot':1A 'pl':16 's':5A 'set':15 'spelling':13 'stompin':2A,3A,14 'the':8B 'themes':12 'u':4A 'usa':7A
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['minimal synth', '70s', 'hard rock', 'psychedelia', 'psychedelic']
                                        'tag_date'  
                                     'discogstags'  ['funk / soul', 'psychedelic rock', 'funk', 'rock']

============================== file details ==============================
                                           'mtime'  1620356414.1941073  (2021-05-07 05:00:14)
                             'size'  2755731