======================== unified (from filesystem) ========================
                                         'bitrate'  '226.055'
                                        'duration'  '207'
                                          'artist'  'Daft Punk'
                                     'text_people'  ''
                                         'release'  'Discovery'
                                           'title'  'Aerodynamic'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-1', 'q-syn-3', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'house', 'electronica', 'electronic', 'techno']"
                                     'discogstags'  "['electronic', 'house', 'downtempo', 'tech house']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno'
                                             'bpm'  '123.256'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000006FA 00000883 00001BFA'
'COMM:iTunNORM:eng'                                 (' 000006FA 00000883 00001BFA 000020EB 0000E586 0001584B 00007BD3 00008000 '
 '0000E586 0000E586')
'TALB' (Album/Movie/Show title)                     'Discovery'
'TBPM' (BPM (beats per minute))                     '123.256'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'Aerodynamic'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Daft Punk'
'TPE2' (Band/orchestra/accompaniment)               'Daft Punk'
'TRCK' (Track number/Position in set)               '2'
'TSSE' (Software/Hardware and settings used for encoding)  'LAME v3.97 (beta)'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electronic', 'house', 'downtempo', 'tech house']
'TXXX:lastfmtags'                                   ['dance', 'house', 'electronica', 'electronic', 'techno']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.54 dB'
'TXXX:replaygain_track_peak'                        '0.576902'

========================== row from database ==========================
                                              'id'  1298737
                                            'path'  /data/Music/Bulk/00poprockelectronic/Daft Punk/[2001] Discovery/02 Aerodynamic.mp3
                                         'working'  None
                                         'bitrate'  226
                                    'duration_sec'  207
                                           'genre'  electronic-th-techno
                                        'filesize'  5952693
                                           'mtime'  1620568789
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic [2001] 02 electronic th techno
                                      'tag_artist'  Daft Punk
                                     'tag_release'  Discovery
                                       'tag_title'  Aerodynamic
                                             'bpm'  123.256
                                    'search_title'  'aerodynamic':1
                                   'search_artist'  'daft':1 'punk':2
                                  'search_release'  'discovery':1
                                     'search_rest'  '00poprockelectronic':1 '2001':2,3 'electronic':4 'techno':6 'th':5
                                    'search_combo'  '00poprockelectronic':5 '2001':6,7 'aerodynamic':1A 'daft':2B 'discovery':4C 'electronic':8 'punk':3B 'techno':10 'th':9
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'house', 'electronica', 'electronic', 'techno']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic', 'house', 'downtempo', 'tech house']

============================== file details ==============================
                                           'mtime'  1620568788.8044534  (2021-05-09 15:59:48)
                             'size'  5952693