======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '154'
                                          'artist'  'The Echoes'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'I Flunked - 1983'
                                           'quals'  ("['Q-JZFKS-2', '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-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['doo wop', 'oldies', '60s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '23'
                                      'tracktotal'  '29'
                                            'date'  '1965'
                                        'comments'  ''
                                           'genre'  'set-pl-spelling'
                                             'bpm'  '121.409'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 00000C1E 000007D0 0000532B 000038BD 000228C1 000228C1 000082F4 00007BFE '
 '0000E100 000015A1')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 0000093C 0000000000683634 00000000 0038A94F 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '29+5D6A9402E6E94E3C24848ED2BD696548+1093442'
'TBPM' (BPM (beats per minute))                     '121.409'
'TCON' (Content type, a.k.a. Genre)                 'set-pl-spelling'
'TDRC' (Recording time)                             '1965'
'TENC' (Encoded by)                                 'iTunes 8.0.2'
'TIT2' (Title/songname/content description)         'I Flunked - 1983'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Echoes'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '23/29'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['doo wop', 'oldies', '60s']
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.90 dB'
'TXXX:replaygain_track_peak'                        '0.510738'

========================== row from database ==========================
                                              'id'  766191
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/spelling/The Echoes -  Flunked (1983).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  154
                                           'genre'  set-pl-spelling
                                        'filesize'  3720598
                                           'mtime'  1620356420
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes spelling (1983) set pl spelling
                                      'tag_artist'  The Echoes
                                     'tag_release'  None
                                       'tag_title'  I Flunked - 1983
                                             'bpm'  121.409
                                    'search_title'  '1983':3 'flunked':2 'i':1
                                   'search_artist'  'echoes':2 'the':1
                                  'search_release'  
                                     'search_rest'  '0novelty':2 '0playlists':1 '1983':5,6 'pl':8 'set':7 'spelling':4 'themes':3
                                    'search_combo'  '0novelty':7 '0playlists':6 '1983':3A,10,11 'echoes':5B 'flunked':2A 'i':1A 'pl':13 'set':12 'spelling':9 'the':4B 'themes':8
                                    'tag_tracknum'  23
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['doo wop', 'oldies', '60s']
                                        'tag_date'  1965
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620356420.3750544  (2021-05-07 05:00:20)
                             'size'  3720598