======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '283'
                                          'artist'  'Frank Zappa'
                                     'text_people'  'Frank Zappa'
                                         'release'  'Freak Out!'
                                           'title'  "Help, I'm a Rock"
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-UNU-2', 'Q-OLDST-2', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-3', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['classic rock', 'jazz', 'progressive rock', 'experimental', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '15'
                                            'date'  '1966'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-experimental'
                                             'bpm'  '84.455'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 00000287 00000483 0000231E'
'COMM:iTunNORM:eng'                                 (' 00000287 00000483 0000231E 00008792 0004014E 00040168 00006155 0000766E '
 '000139E0 00007905')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000A50 0000000000BE91A0 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '15+62C30212A94EFEE8FA6A28DFDF273223+443426'
'TALB' (Album/Movie/Show title)                     'Freak Out!'
'TBPM' (BPM (beats per minute))                     '84.455'
'TCOM' (Composer)                                   'Frank Zappa'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-experimental'
'TDRC' (Recording time)                             '1966'
'TENC' (Encoded by)                                 'iTunes v5.0.0.35'
'TIT2' (Title/songname/content description)         "Help, I'm a Rock"
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Frank Zappa'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '13/15'
'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:lastfmtags'                                   ['classic rock', 'jazz', 'progressive rock', 'experimental', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.06 dB'
'TXXX:replaygain_track_peak'                        '0.771627'

========================== row from database ==========================
                                              'id'  1498798
                                            'path'  /data/Music/Bulk/00poprockelectronic/Frank Zappa/Freak Out!/Frank Zappa - freak out! - 13 - help, i_m a rock.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  283
                                           'genre'  ifs-songwriter-experimental
                                        'filesize'  6800749
                                           'mtime'  1636757596
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic freak out! 13 help, i_m rock ifs songwriter experimental
                                      'tag_artist'  Frank Zappa
                                     'tag_release'  Freak Out!
                                       'tag_title'  Help, I'm a Rock
                                             'bpm'  84.455
                                    'search_title'  'a':6 'help':1,2 'i':3 'im':5 'm':4 'rock':7
                                   'search_artist'  'frank':1 'zappa':2
                                  'search_release'  'freak':1 'out':2
                                     'search_rest'  '00poprockelectronic':1 'experimental':11 'freak':2 'help':4,5 'i':6 'ifs':9 'm':7 'out':3 'rock':8 'songwriter':10
                                    'search_combo'  '00poprockelectronic':12 'a':6A 'experimental':22 'frank':8B 'freak':10C,13 'help':1A,2A,15,16 'i':3A,17 'ifs':20 'im':5A 'm':4A,18 'out':11C,14 'rock':7A,19 'songwriter':21 'zappa':9B
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-2', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  ['classic rock', 'jazz', 'progressive rock', 'experimental', 'rock']
                                        'tag_date'  1966
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636757596.0170832  (2021-11-12 23:53:16)
                             'size'  6800749