======================== unified (from filesystem) ========================
                                         'bitrate'  '291.765'
                                        'duration'  '338'
                                          'artist'  'Tiga'
                                     'text_people'  ''
                                         'release'  'Ciao!'
                                           'title'  'What You Need'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-UNU-1', 'q-syn-3', '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-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'house', 'electroclash', 'electro', 'electronic']"
                                     'discogstags'  "['electronic', 'house', 'electro']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '127.685'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 0000231C 00002403 000189FF 000165E3 00041B05 00041B05 000096C3 00009899 '
 '00042BDB 000462DB')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000B58 0000000000E36898 00000000 00BC0698 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TALB' (Album/Movie/Show title)                     'Ciao!'
'TBPM' (BPM (beats per minute))                     '127.685'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TDRC' (Recording time)                             '2009'
'TENC' (Encoded by)                                 'iTunes 8.1'
'TIT2' (Title/songname/content description)         'What You Need'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Tiga'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electronic', 'house', 'electro']
'TXXX:lastfmtags'                                   ['dance', 'house', 'electroclash', 'electro', 'electronic']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.80 dB'
'TXXX:replaygain_track_peak'                        '0.301441'

========================== row from database ==========================
                                              'id'  1313963
                                            'path'  /data/Music/Bulk/00poprockelectronic/Tiga/Ciao/04 What You Need.mp3
                                         'working'  None
                                         'bitrate'  291
                                    'duration_sec'  338
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  12554862
                                           'mtime'  1621696661
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 04 electronic generic or radio dance
                                      'tag_artist'  Tiga
                                     'tag_release'  Ciao!
                                       'tag_title'  What You Need
                                             'bpm'  127.685
                                    'search_title'  'need':3 'what':1 'you':2
                                   'search_artist'  'tiga':1
                                  'search_release'  'ciao':1
                                     'search_rest'  '00poprockelectronic':1 'dance':6 'electronic':2 'generic':3 'or':4 'radio':5
                                    'search_combo'  '00poprockelectronic':6 'ciao':5C 'dance':11 'electronic':7 'generic':8 'need':3A 'or':9 'radio':10 'tiga':4B 'what':1A 'you':2A
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-3', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'house', 'electroclash', 'electro', 'electronic']
                                        'tag_date'  2009
                                     'discogstags'  ['electronic', 'house', 'electro']

============================== file details ==============================
                                           'mtime'  1621696660.597129  (2021-05-22 17:17:40)
                             'size'  12554862