======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '116'
                                          'artist'  'Cowboy Bebop'
                                     'text_people'  ''
                                         'release'  'Cowboy Bebop CD-BOX OST Limite'
                                           'title'  'Goodnight Julia'
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', 'Q-PIANO-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-vocals-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['soundtrack', 'japanese', 'anime', 'jazz', 'instrumental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '24'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'soundtrack-video'
                                             'bpm'  '120.042'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Cowboy Bebop CD-BOX OST Limite'
'TBPM' (BPM (beats per minute))                     '120.042'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-video'
'TIT2' (Title/songname/content description)         'Goodnight Julia'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Cowboy Bebop'
'TRCK' (Track number/Position in set)               '24'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['soundtrack', 'japanese', 'anime', 'jazz', 'instrumental']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.20 dB'
'TXXX:replaygain_track_peak'                        '0.465849'

========================== row from database ==========================
                                              'id'  260126
                                            'path'  /data/Music/Bulk/0soundtrack/Cowboy Bebop/MBZ;#Cowboy Bebop;#Cowboy Bebop CD-BOX OST Limited Edition (disc 2);#24;#Goodnight Julia.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  116
                                           'genre'  soundtrack-video
                                        'filesize'  1873370
                                           'mtime'  1620332895
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack MBZ;#Cowboy Bebop;#Cowboy Limited Edition (disc 2);#24;#Goodnight soundtrack video
                                      'tag_artist'  Cowboy Bebop
                                     'tag_release'  Cowboy Bebop CD-BOX OST Limite
                                       'tag_title'  Goodnight Julia
                                             'bpm'  120.042
                                    'search_title'  'goodnight':1 'julia':2
                                   'search_artist'  'bebop':2 'cowboy':1
                                  'search_release'  'bebop':2 'box':4 'cd':3 'cdbox':5 'cowboy':1 'limite':7 'ost':6
                                     'search_rest'  '0soundtrack':1 '2':14,17 '24':15,18 'bebop':6,8 'cowboy':3,5,7,9 'disc':12,13 'edition':11 'goodnight':16,19 'limited':10 'mbz':2,4 'soundtrack':20 'video':21
                                    'search_combo'  '0soundtrack':12 '2':25,28 '24':26,29 'bebop':4B,6C,17,19 'box':8C 'cd':7C 'cdbox':9C 'cowboy':3B,5C,14,16,18,20 'disc':23,24 'edition':22 'goodnight':1A,27,30 'julia':2A 'limite':11C 'limited':21 'mbz':13,15 'ost':10C 'soundtrack':31 'video':32
                                    'tag_tracknum'  24
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-4', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['soundtrack', 'japanese', 'anime', 'jazz', 'instrumental']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620332895.4467666  (2021-05-06 22:28:15)
                             'size'  1873370