======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '246'
                                          'artist'  'Shiina Ringo'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Application'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'Q-PLAY-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-3', 'q-other-2', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['japanese', 'j-rock', 'j-pop', 'female vocalists', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-asia-japan;loc-asia-japan-jrock'
                                             'bpm'  '121.337'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '121.337'
'TCON' (Content type, a.k.a. Genre)                 ['loc-asia-japan', 'loc-asia-japan-jrock']
'TIT2' (Title/songname/content description)         'Application'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Shiina Ringo'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['japanese', 'j-rock', 'j-pop', 'female vocalists', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.37 dB'
'TXXX:replaygain_track_peak'                        '0.350953'

========================== row from database ==========================
                                              'id'  927150
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/Shiina Ringo & Tokyo Jihen/Shiina Ringo/Shina Ringo - Application.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  246
                                           'genre'  loc-asia-japan;loc-asia-japan-jrock
                                        'filesize'  3948812
                                           'mtime'  1637020204
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia & Tokyo Jihen Shina loc asia japan;loc asia japan jrock
                                      'tag_artist'  Shiina Ringo
                                     'tag_release'  None
                                       'tag_title'  Application
                                             'bpm'  121.337
                                    'search_title'  'application':1
                                   'search_artist'  'ringo':2 'shiina':1
                                  'search_release'  
                                     'search_rest'  '00asia':1 'asia':6 'japan':7,9,11 'jihen':3 'jrock':12 'loc':5,8,10 'shina':4 'tokyo':2
                                    'search_combo'  '00asia':4 'application':1A 'asia':9 'japan':10,12,14 'jihen':6 'jrock':15 'loc':8,11,13 'ringo':3B 'shiina':2B 'shina':7 'tokyo':5
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-2', '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-3', 'Q-PLAY-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['japanese', 'j-rock', 'j-pop', 'female vocalists', 'rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637020204.4543734  (2021-11-16 00:50:04)
                             'size'  3948812