======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '178'
                                          'artist'  'SADS'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Nightmare'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['visual kei', 'jrock', 'post punk', 'japanese', 'rock', 'j rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-asia-japan;loc-asia-japan-jrock-visualkei'
                                             'bpm'  '145.059'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '145.059'
'TCON' (Content type, a.k.a. Genre)                 ['loc-asia-japan', 'loc-asia-japan-jrock-visualkei']
'TIT2' (Title/songname/content description)         'Nightmare'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'SADS'
'TXXX:Mp3gain_minmax'                               '115,184'
'TXXX:Mp3gain_undo'                                 '+009,+009,N'
'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:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['visual kei', 'jrock', 'post punk', 'japanese', 'rock', 'j rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.50 dB'
'TXXX:replaygain_track_peak'                        '0.292026'

========================== row from database ==========================
                                              'id'  347842
                                            'path'  /data/Music/Bulk/00localcharacter/SADS/Sads - NIGHTMARE.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  178
                                           'genre'  loc-asia-japan;loc-asia-japan-jrock-visualkei
                                        'filesize'  2860047
                                           'mtime'  1637020013
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter Sads NIGHTMARE loc asia japan;loc asia japan jrock visualkei
                                      'tag_artist'  SADS
                                     'tag_release'  None
                                       'tag_title'  Nightmare
                                             'bpm'  145.059
                                    'search_title'  'nightmare':1
                                   'search_artist'  'sads':1
                                  'search_release'  
                                     'search_rest'  'asia':4 'japan':5,7,9 'jrock':10 'loc':3,6,8 'nightmare':2 'sads':1 'visualkei':11
                                    'search_combo'  'asia':6 'japan':7,9,11 'jrock':12 'loc':5,8,10 'nightmare':1A,4 'sads':2B,3 'visualkei':13
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  ['visual kei', 'jrock', 'post punk', 'japanese', 'rock', 'j rock']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1637020013.059309  (2021-11-16 00:46:53)
                             'size'  2860047