======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '84'
                                          'artist'  'Piano Squall'
                                     'text_people'  ''
                                         'release'  'GAME: Game & Anime Music Emotions'
                                           'title'  'Boss Battle'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-2', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['video game music', 'piano', 'pianist', 'american', 'arranger']"
                                     'discogstags'  "['romantic', 'classical', 'contemporary']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  '18'
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'soundtrack-game'
                                             'bpm'  '126.7'
                                             'key'  '9A'
                                        'acoustid'  'c2fe7393-be3f-4304-b02a-73eba3a060ca'
rest: ''

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

'TALB' (Album/Movie/Show title)                     'GAME: Game & Anime Music Emotions'
'TBPM' (BPM (beats per minute))                     '126.7'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-game'
'TDOR' (Original release time)                      '2007'
'TDRC' (Recording time)                             '2007'
'TIT2' (Title/songname/content description)         'Boss Battle'
'TKEY' (Initial key)                                '9A'
'TMED' (Media type)                                 'Digital Media'
'TPE1' (Lead performer(s)/Soloist(s))               'Piano Squall'
'TPE2' (Band/orchestra/accompaniment)               'Piano Squall'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '18/18'
'TSO2'                                              'Piano Squall'
'TSOP' (Performer sort order)                       'Piano Squall'
'TXXX:ASIN'                                         'B006P7IFLS'
'TXXX:Acoustid Id'                                  'c2fe7393-be3f-4304-b02a-73eba3a060ca'
'TXXX:MusicBrainz Album Artist Id'                  'd19572a3-b3bb-4f84-8941-61be7e704fd8'
'TXXX:MusicBrainz Album Id'                         '7bd7636c-36d8-432d-b8b2-f06e0d73ed98'
'TXXX:MusicBrainz Album Release Country'            'XW'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'd19572a3-b3bb-4f84-8941-61be7e704fd8'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['romantic', 'classical', 'contemporary']
'TXXX:lastfmtags'                                   ['video game music', 'piano', 'pianist', 'american', 'arranger']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.84 dB'
'TXXX:replaygain_track_peak'                        '0.507501'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'2d735340-3900-42e4-96ca-4945000f4e57')

========================== row from database ==========================
                                              'id'  916393
                                            'path'  /data/Music/Bulk/00instruments-classical/2007 - GAME - Game & Anime Music Emotions/18) Boss Battle (Original Composition).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  84
                                           'genre'  soundtrack-game
                                        'filesize'  3393744
                                           'mtime'  1636916369
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 2007 18) (Original Composition) soundtrack game
                                      'tag_artist'  Piano Squall
                                     'tag_release'  GAME: Game & Anime Music Emotions
                                       'tag_title'  Boss Battle
                                             'bpm'  126.7
                                    'search_title'  'battle':2 'boss':1
                                   'search_artist'  'piano':1 'squall':2
                                  'search_release'  'anime':3 'emotions':5 'game':1,2 'music':4
                                     'search_rest'  '00instruments':1 '18':4,5 '2007':3 'classical':2 'composition':8,9 'game':11 'original':6,7 'soundtrack':10
                                    'search_combo'  '00instruments':10 '18':13,14 '2007':12 'anime':7C 'battle':2A 'boss':1A 'classical':11 'composition':17,18 'emotions':9C 'game':5C,6C,20 'music':8C 'original':15,16 'piano':3B 'soundtrack':19 'squall':4B
                                    'tag_tracknum'  18
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['video game music', 'piano', 'pianist', 'american', 'arranger']
                                        'tag_date'  2007
                                     'discogstags'  ['romantic', 'classical', 'contemporary']

============================== file details ==============================
                                           'mtime'  1636916368.5561457  (2021-11-14 19:59:28)
                             'size'  3393744