======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '282'
                                          'artist'  'Don Caballero'
                                     'text_people'  ''
                                         'release'  'World Class Listening Problem'
                                           'title'  'Savage Composition'
                                           'quals'  ("['Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-3', "
 "'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['math rock', 'instrumental', 'progressive rock', 'post rock', 'experimental']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '10'
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'rock-unsorted;set-pl-sced'
                                             'bpm'  '93.285'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000010D8 00001660 00005AC1'
'COMM:iTunNORM:eng'                                 (' 000010D8 00001660 00005AC1 0000A12D 00016C2F 0003DB8D 00008AA6 00008A8C '
 '00029F05 0003410F')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000A2C 0000000000BE2A44 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '10+C94E9C0E4BC8645A276AAD5331FB1B59+7069356'
'TALB' (Album/Movie/Show title)                     'World Class Listening Problem'
'TBPM' (BPM (beats per minute))                     '93.285'
'TCON' (Content type, a.k.a. Genre)                 ['rock-unsorted', 'set-pl-sced']
'TDRC' (Recording time)                             '2006'
'TENC' (Encoded by)                                 'iTunes v6.0.0.18'
'TIT2' (Title/songname/content description)         'Savage Composition'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Don Caballero'
'TPE2' (Band/orchestra/accompaniment)               'Don Caballero'
'TRCK' (Track number/Position in set)               '9/10'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['math rock', 'instrumental', 'progressive rock', 'post rock', 'experimental']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.25 dB'
'TXXX:replaygain_track_peak'                        '0.393139'

========================== row from database ==========================
                                              'id'  1351926
                                            'path'  /data/Music/Bulk/00poprockelectronic/Don Caballero/[2006] World Class Listening Problem/09 Savage Composition.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  282
                                           'genre'  rock-unsorted;set-pl-sced
                                        'filesize'  11370201
                                           'mtime'  1620389568
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic [2006] 09 rock unsorted;set pl sced
                                      'tag_artist'  Don Caballero
                                     'tag_release'  World Class Listening Problem
                                       'tag_title'  Savage Composition
                                             'bpm'  93.285
                                    'search_title'  'composition':2 'savage':1
                                   'search_artist'  'caballero':2 'don':1
                                  'search_release'  'class':2 'listening':3 'problem':4 'world':1
                                     'search_rest'  '00poprockelectronic':1 '2006':2,3 'pl':9 'rock':4 'sced':10 'set':6,8 'unsorted':5,7
                                    'search_combo'  '00poprockelectronic':9 '2006':10,11 'caballero':4B 'class':6C 'composition':2A 'don':3B 'listening':7C 'pl':17 'problem':8C 'rock':12 'savage':1A 'sced':18 'set':14,16 'unsorted':13,15 'world':5C
                                    'tag_tracknum'  9
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['math rock', 'instrumental', 'progressive rock', 'post rock', 'experimental']
                                        'tag_date'  2006
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620389567.8321822  (2021-05-07 14:12:47)
                             'size'  11370201