======================== unified (from filesystem) ========================
                                         'bitrate'  '64.0'
                                        'duration'  '198'
                                          'artist'  'Alessandro Moreschi'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Ave Maria'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['opera', 'male vocalists', 'castrato', 'classical']"
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1904'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted;set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '140.3'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'TBPM' (BPM (beats per minute))                     '140.3'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-unsorted', 'set-pl-shirleyspinoza', 'set-pl-mor']
'TDRC' (Recording time)                             '1904'
'TIT2' (Title/songname/content description)         'Ave Maria'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Alessandro Moreschi'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['opera', 'male vocalists', 'castrato', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.79 dB'
'TXXX:replaygain_track_peak'                        '0.441746'

========================== row from database ==========================
                                              'id'  512118
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1904 - Alessandro Moreschi - Ave Maria (the last castrato).mp3
                                         'working'  None
                                         'bitrate'  64
                                    'duration_sec'  198
                                           'genre'  prerock-unsorted;set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  1591907
                                           'mtime'  1678927295
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] 1904 (the last castrato) prerock unsorted;set pl shirleyspinoza;set pl mor
                                      'tag_artist'  Alessandro Moreschi
                                     'tag_release'  None
                                       'tag_title'  Ave Maria
                                             'bpm'  140.3
                                    'search_title'  'ave':1 'maria':2
                                   'search_artist'  'alessandro':1 'moreschi':2
                                  'search_release'  
                                     'search_rest'  '1878':11 '1904':20 '1920':12 '32k':14,16,18 'castrato':24,25 'cylinder':2,4 'cylindervery':6 'last':23 'mor':36 'old':7 'pl':31 'prerock':26 'recordings':8,9,10 'set':28,30,33,35 'shirleyspinoza':32,34 'the':21,22 'unsorted':27,29 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':15 '1904':24 '1920':16 '32k':18,20,22 'alessandro':3B 'ave':1A 'castrato':28,29 'cylinder':6,8 'cylindervery':10 'last':27 'maria':2A 'mor':40 'moreschi':4B 'old':11 'pl':35 'prerock':30 'recordings':12,13,14 'set':32,34,37,39 'shirleyspinoza':36,38 'the':25,26 'unsorted':31,33 'very':7,9 'wax':5 'wma':17,19,21 'wma32k':23
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HAP-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', 'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']
                                      'lastfmtags'  ['opera', 'male vocalists', 'castrato', 'classical']
                                        'tag_date'  1904
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1678927295.1246247  (2023-03-16 01:41:35)
                             'size'  1591907