======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '238'
                                          'artist'  'Apocalyptica'
                                     'text_people'  ''
                                         'release'  'Inquisition Symphony'
                                           'title'  'M.B.'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-3', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'metal', 'symphonic metal', 'finnish', 'heavy metal']"
                                     'discogstags'  "['rock', 'alternative rock', 'modern classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '11'
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '116'
                                             'key'  '3A'
                                        'acoustid'  '121661fe-766c-413b-abf1-fa97b53f670e'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Inquisition Symphony'
'TBPM' (BPM (beats per minute))                     '116'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDOR' (Original release time)                      '1998'
'TDRC' (Recording time)                             '1998'
'TIT2' (Title/songname/content description)         'M.B.'
'TKEY' (Initial key)                                '3A'
'TMED' (Media type)                                 'Digital Media'
'TPE1' (Lead performer(s)/Soloist(s))               'Apocalyptica'
'TPE2' (Band/orchestra/accompaniment)               'Apocalyptica'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '6/11'
'TSO2'                                              'Apocalyptica'
'TSOP' (Performer sort order)                       'Apocalyptica'
'TSRC' (ISRC (international standard recording code))  'FIPFP9800039'
'TXXX:Acoustid Id'                                  '121661fe-766c-413b-abf1-fa97b53f670e'
'TXXX:Artists'                                      'Apocalyptica'
'TXXX:MusicBrainz Album Artist Id'                  '788ad31c-bf0c-4a31-83f8-b8b130d79c76'
'TXXX:MusicBrainz Album Id'                         'd5a11f5f-7cea-4dfc-9806-cf1ac654e090'
'TXXX:MusicBrainz Album Release Country'            'FI'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '788ad31c-bf0c-4a31-83f8-b8b130d79c76'
'TXXX:MusicBrainz Release Group Id'                 'b9a5ae03-8cdc-3d94-a2c7-edf8e3b15e3e'
'TXXX:MusicBrainz Release Track Id'                 '855435f9-9177-43b6-a48b-0713af318959'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['rock', 'alternative rock', 'modern classical']
'TXXX:lastfmtags'                                   ['instrumental', 'metal', 'symphonic metal', 'finnish', 'heavy metal']
'TXXX:originalyear'                                 '1998'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.87 dB'
'TXXX:replaygain_track_peak'                        '0.525288'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'784bd946-bcd5-4fba-b6e0-4664491c3b4a')

========================== row from database ==========================
                                              'id'  1324674
                                            'path'  /data/Music/Bulk/00instruments-classical/Apocalyptica/Inquisition Symphony/Apocalyptica - M.B.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  238
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  3921927
                                           'mtime'  1620561463
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical prerock classical or classical instruments
                                      'tag_artist'  Apocalyptica
                                     'tag_release'  Inquisition Symphony
                                       'tag_title'  M.B.
                                             'bpm'  116.0
                                    'search_title'  'b':2 'm':1 'mb':3
                                   'search_artist'  'apocalyptica':1
                                  'search_release'  'inquisition':1 'symphony':2
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':5 'or':4 'prerock':3
                                    'search_combo'  '00instruments':7 'apocalyptica':4B 'b':2A 'classical':8 'inquisition':5C 'instruments':11 'm':1A 'mb':3A 'or':10 'prerock':9 'symphony':6C
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-3']
                                      'lastfmtags'  ['instrumental', 'metal', 'symphonic metal', 'finnish', 'heavy metal']
                                        'tag_date'  1998
                                     'discogstags'  ['rock', 'alternative rock', 'modern classical']

============================== file details ==============================
                                           'mtime'  1620561463.3828914  (2021-05-09 13:57:43)
                             'size'  3921927