======================== unified (from filesystem) ========================
                                         'bitrate'  '150.295'
                                        'duration'  '110'
                                          'artist'  'Masato Nakamura'
                                     'text_people'  ''
                                         'release'  'Sonic the Hedgehog 2 OST'
                                           'title'  'Metropolis Zone'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['video game music', 'japanese', 'soundtrack', 'sonic', 'instrumental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '23'
                                      'tracktotal'  ''
                                            'date'  '1992'
                                        'comments'  ''
                                           'genre'  'soundtrack-game;electronic-we-beeps or chip or pico'
                                             'bpm'  '91.556'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Sonic the Hedgehog 2 OST'
'TBPM' (BPM (beats per minute))                     '91.556'
'TCON' (Content type, a.k.a. Genre)                 ['soundtrack-game', 'electronic-we-beeps or chip or pico']
'TDRC' (Recording time)                             '1992'
'TIT2' (Title/songname/content description)         'Metropolis Zone'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Masato Nakamura'
'TRCK' (Track number/Position in set)               '23'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['video game music', 'japanese', 'soundtrack', 'sonic', 'instrumental']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.33 dB'
'TXXX:replaygain_track_peak'                        '0.727132'

========================== row from database ==========================
                                              'id'  256937
                                            'path'  /data/Music/Bulk/0soundtrack/Masato Nakamura/Sonic the Hedgehog 2 OST/23 Metropolis Zone.mp3
                                         'working'  None
                                         'bitrate'  150
                                    'duration_sec'  110
                                           'genre'  soundtrack-game;electronic-we-beeps or chip or pico
                                        'filesize'  2079955
                                           'mtime'  1636911961
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack 23 soundtrack game;electronic we beeps or chip or pico
                                      'tag_artist'  Masato Nakamura
                                     'tag_release'  Sonic the Hedgehog 2 OST
                                       'tag_title'  Metropolis Zone
                                             'bpm'  91.556
                                    'search_title'  'metropolis':1 'zone':2
                                   'search_artist'  'masato':1 'nakamura':2
                                  'search_release'  '2':4 'hedgehog':3 'ost':5 'sonic':1 'the':2
                                     'search_rest'  '0soundtrack':1 '23':2 'beeps':9 'chip':11 'electronic':5,7 'game':4,6 'or':10 'pico':12 'soundtrack':3 'we':8
                                    'search_combo'  '0soundtrack':10 '2':8C '23':11 'beeps':18 'chip':20 'electronic':14,16 'game':13,15 'hedgehog':7C 'masato':3B 'metropolis':1A 'nakamura':4B 'or':19 'ost':9C 'pico':21 'sonic':5C 'soundtrack':12 'the':6C 'we':17 'zone':2A
                                    'tag_tracknum'  23
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['video game music', 'japanese', 'soundtrack', 'sonic', 'instrumental']
                                        'tag_date'  1992
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636911961.468827  (2021-11-14 18:46:01)
                             'size'  2079955