======================== unified (from filesystem) ========================
                                         'bitrate'  '198.933'
                                        'duration'  '385'
                                          'artist'  'Bad Boys Blue'
                                     'text_people'  ''
                                         'release'  'I Love Disco Diamonds'
                                           'title'  'I Wanna Hear Your Heartbeat (Sunday Girl)'
                                           'quals'  ("['Q-HAP-4', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'pop', 'disco', 'eurodance', '80s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'electronic-we-disco or italo'
                                             'bpm'  '112.508'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM::XXX'                                         ' '
'COMM:iTunSMPB:eng'                                 (' 00000000 00000000 00000000 0000000000000000 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TALB' (Album/Movie/Show title)                     'I Love Disco Diamonds'
'TBPM' (BPM (beats per minute))                     '112.508'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-disco or italo'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'I Wanna Hear Your Heartbeat (Sunday Girl)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bad Boys Blue'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '4'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['dance', 'pop', 'disco', 'eurodance', '80s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.38 dB'
'TXXX:replaygain_track_peak'                        '0.612623'

========================== row from database ==========================
                                              'id'  1299417
                                            'path'  /data/Music/Bulk/00poprockelectronic-waves-disco/00disco-italo/Martinelli - The Best Italo Disco/(01) [Bad Boys Blue] I Wanna Hear Your Heartbeat (Sunday Girl).mp3
                                         'working'  None
                                         'bitrate'  198
                                    'duration_sec'  385
                                           'genre'  electronic-we-disco or italo
                                        'filesize'  9591239
                                           'mtime'  1620609594
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic waves disco 00disco italo Martinelli The Best Italo (01) [Bad Blue] electronic we disco or italo
                                      'tag_artist'  Bad Boys Blue
                                     'tag_release'  I Love Disco Diamonds
                                       'tag_title'  I Wanna Hear Your Heartbeat (Sunday Girl)
                                             'bpm'  112.508
                                    'search_title'  'girl':8,9 'hear':3 'heartbeat':5 'i':1 'sunday':6,7 'wanna':2 'your':4
                                   'search_artist'  'bad':1 'blue':3 'boys':2
                                  'search_release'  'diamonds':4 'disco':3 'i':1 'love':2
                                     'search_rest'  '00disco':4 '00poprockelectronic':1 '01':9,10 'bad':11,12 'best':8 'blue':13,14 'disco':3 'electronic':15 'italo':5 'martinelli':6 'or':17 'the':7 'waves':2 'we':16
                                    'search_combo'  '00disco':20 '00poprockelectronic':17 '01':25,26 'bad':10B,27,28 'best':24 'blue':12B,29,30 'boys':11B 'diamonds':16C 'disco':15C,19 'electronic':31 'girl':8A,9A 'hear':3A 'heartbeat':5A 'i':1A,13C 'italo':21 'love':14C 'martinelli':22 'or':33 'sunday':6A,7A 'the':23 'wanna':2A 'waves':18 'we':32 'your':4A
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-2', 'q-other-2', 'Q-HAP-4', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['dance', 'pop', 'disco', 'eurodance', '80s']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620609593.7665632  (2021-05-10 03:19:53)
                             'size'  9591239