======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '3310'
                                          'artist'  'Xenakis'
                                     'text_people'  ''
                                         'release'  'electronic'
                                           'title'  'Persepolis (1971)'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['contemporary classical', 'avant-garde', 'experimental', 'earwaves', "
 "'electronic']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '1'
                                            'date'  '1971'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '123.3'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'COMM:iTunNORM:eng'                                 (' 0000028E 000002EC 000058B9 00005D5C 002CB153 002CB153 00007D5D 00007C6F '
 '00319CD1 0028D592')
'COMM:iTunPGAP:eng'                                 '1'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000954 0000000008B35E1C 00000000 04BC1EDD 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '1+21E255B8DE38388F0F3307D84B799287+855123'
'TALB' (Album/Movie/Show title)                     'electronic'
'TBPM' (BPM (beats per minute))                     '123.3'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '1971'
'TENC' (Encoded by)                                 'iTunes v7.6.2'
'TIT2' (Title/songname/content description)         'Persepolis (1971)'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Xenakis'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '1/1'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['contemporary classical',
 'avant-garde',
 'experimental',
 'earwaves',
 'electronic']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.25 dB'
'TXXX:replaygain_track_peak'                        '0.819206'

========================== row from database ==========================
                                              'id'  768032
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Xenakis_lots_of_recordings/01 Persepolis (1971).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  3310
                                           'genre'  electronic-unsorted
                                        'filesize'  79444753
                                           'mtime'  1636758600
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Xenakis_lots_of_recordings 01 unsorted
                                      'tag_artist'  Xenakis
                                     'tag_release'  electronic
                                       'tag_title'  Persepolis (1971)
                                             'bpm'  123.3
                                    'search_title'  '1971':2,3 'persepolis':1
                                   'search_artist'  'xenakis':1
                                  'search_release'  'electronic':1
                                     'search_rest'  'lots':2 'of':3 'recordings':4 'unsorted':5 'xenakis':1
                                    'search_combo'  '1971':2A,3A 'electronic':5C 'lots':7 'of':8 'persepolis':1A 'recordings':9 'unsorted':10 'xenakis':4B,6
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['contemporary classical', 'avant-garde', 'experimental', 'earwaves', 'electronic']
                                        'tag_date'  1971
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636758599.9690251  (2021-11-13 00:09:59)
                             'size'  79444753