======================== unified (from filesystem) ========================
                                         'bitrate'  '206.648'
                                        'duration'  '206'
                                          'artist'  'The Prodigy'
                                     'text_people'  ''
                                         'release'  'Invaders Must Die'
                                           'title'  'Black Smoke (Bonus Track)'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['industrial', 'dance', 'techno', 'electronic', 'electronica']"
                                     'discogstags'  "['electronic', 'breaks', 'big beat']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  ''
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno'
                                             'bpm'  '120.042'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000011CA 00000FEF 0000C849'
'COMM:iTunNORM:eng'                                 (' 000011CA 00000FEF 0000C849 0000C73A 000211B4 000211B4 00008000 00008000 '
 '0000025B 00001F90')
'TALB' (Album/Movie/Show title)                     'Invaders Must Die'
'TBPM' (BPM (beats per minute))                     '120.042'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno'
'TDRC' (Recording time)                             '2009'
'TENC' (Encoded by)                                 'LAME 3.97 V2: preset standard'
'TIT2' (Title/songname/content description)         'Black Smoke (Bonus Track)'
'TKEY' (Initial key)                                '8A'
'TLAN' (Language(s))                                'German'
'TPE1' (Lead performer(s)/Soloist(s))               'The Prodigy'
'TPE2' (Band/orchestra/accompaniment)               'The Prodigy'
'TRCK' (Track number/Position in set)               '12'
'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', 'breaks', 'big beat']
'TXXX:lastfmtags'                                   ['industrial', 'dance', 'techno', 'electronic', 'electronica']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.15 dB'
'TXXX:replaygain_track_peak'                        '0.449653'

========================== row from database ==========================
                                              'id'  1358454
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/Prodigy/12 the prodigy - black smoke (bonus track).mp3
                                         'working'  None
                                         'bitrate'  206
                                    'duration_sec'  206
                                           'genre'  electronic-th-techno
                                        'filesize'  5330153
                                           'mtime'  1620572485
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted 12 the prodigy black smoke (bonus track) electronic th techno
                                      'tag_artist'  The Prodigy
                                     'tag_release'  Invaders Must Die
                                       'tag_title'  Black Smoke (Bonus Track)
                                             'bpm'  120.042
                                    'search_title'  'black':1 'bonus':3,4 'smoke':2 'track':5,6
                                   'search_artist'  'prodigy':2 'the':1
                                  'search_release'  'die':3 'invaders':1 'must':2
                                     'search_rest'  '00poprockelectronic':1 'black':5 'bonus':7,8 'electronic':11 'prodigy':4 'smoke':6 'techno':13 'th':12 'the':3 'track':9,10 'unsorted':2
                                    'search_combo'  '00poprockelectronic':12 'black':1A,16 'bonus':3A,4A,18,19 'die':11C 'electronic':22 'invaders':9C 'must':10C 'prodigy':8B,15 'smoke':2A,17 'techno':24 'th':23 'the':7B,14 'track':5A,6A,20,21 'unsorted':13
                                    'tag_tracknum'  12
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['industrial', 'dance', 'techno', 'electronic', 'electronica']
                                        'tag_date'  2009
                                     'discogstags'  ['electronic', 'breaks', 'big beat']

============================== file details ==============================
                                           'mtime'  1620572484.7237504  (2021-05-09 17:01:24)
                             'size'  5330153