======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '221'
                                          'artist'  'Album Artist'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'BoA'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-2', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-asia-japan;loc-asia-japan-jpop'
                                             'bpm'  '146.000'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '146.000'
'TCON' (Content type, a.k.a. Genre)                 ['loc-asia-japan', 'loc-asia-japan-jpop']
'TIT2' (Title/songname/content description)         'BoA'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Album Artist'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.29 dB'
'TXXX:replaygain_track_peak'                        '0.350591'

========================== row from database ==========================
                                              'id'  927657
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/Unsorted/04.(If You Were Here)-BoA.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  221
                                           'genre'  loc-asia-japan;loc-asia-japan-jpop
                                        'filesize'  5314208
                                           'mtime'  1637330162
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia Unsorted 04.(If You Were Here) loc asia japan;loc asia japan jpop
                                      'tag_artist'  Album Artist
                                     'tag_release'  None
                                       'tag_title'  BoA
                                             'bpm'  146.0
                                    'search_title'  'a':3 'bo':2 'boa':1
                                   'search_artist'  'album':1 'artist':2
                                  'search_release'  
                                     'search_rest'  '00asia':1 '04':3 '04if':5 'asia':11 'here':8,9 'if':4 'japan':12,14,16 'jpop':17 'loc':10,13,15 'unsorted':2 'were':7 'you':6
                                    'search_combo'  '00asia':6 '04':8 '04if':10 'a':3A 'album':4B 'artist':5B 'asia':16 'bo':2A 'boa':1A 'here':13,14 'if':9 'japan':17,19,21 'jpop':22 'loc':15,18,20 'unsorted':7 'were':12 'you':11
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637330162.2437766  (2021-11-19 14:56:02)
                             'size'  5314208