======================== unified (from filesystem) ========================
                                         'bitrate'  '251.004'
                                        'duration'  '59'
                                          'artist'  ('Dieterich Buxtehude; Ton Koopman, Amsterdam Baroque Orchestra, Amsterdam '
 'Baroque Choir')
                                     'text_people'  ''
                                         'release'  'Opera Omnia'
                                           'title'  'Aria. More Palatino, BuxWV 247: Variatio 4'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '46'
                                            'date'  '2014'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '99.371'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Opera Omnia'
'TBPM' (BPM (beats per minute))                     '99.371'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDOR' (Original release time)                      '2014'
'TDRC' (Recording time)                             '2014-11-11'
'TIT2' (Title/songname/content description)         'Aria. More Palatino, BuxWV 247: Variatio 4'
'TKEY' (Initial key)                                '2A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Dieterich Buxtehude'
'TPE2' (Band/orchestra/accompaniment)               ('Dieterich Buxtehude; Ton Koopman, Amsterdam Baroque Orchestra, Amsterdam '
 'Baroque Choir')
'TPOS' (Part of a set)                              '2/30'
'TPUB' (Publisher)                                  'Challenge Classics'
'TRCK' (Track number/Position in set)               '4/46'
'TSO2'                                              ('Buxtehude, Dieterich; Koopman, Ton, Amsterdam Baroque Orchestra, Amsterdam '
 'Baroque Choir')
'TSOP' (Performer sort order)                       'Buxtehude, Dieterich'
'TXXX:ASIN'                                         'B00NXUKA5E'
'TXXX:Artists'                                      'Dieterich Buxtehude'
'TXXX:MusicBrainz Album Artist Id'                  'f106fb52-0b54-4135-bdfd-9ccfd7e320cb/448da1b1-43a3-4239-b2c1-f7e46463439e/fed3aea9-0069-4970-9344-522066f0b0c1/7573ab88-b3ee-424a-84ec-3f8581385e5d'
'TXXX:MusicBrainz Album Id'                         'c50a5d02-8962-45f1-aaf5-8f527ca18821'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'f106fb52-0b54-4135-bdfd-9ccfd7e320cb'
'TXXX:MusicBrainz Release Group Id'                 '0ef61ae2-bec4-4a6c-bef3-843bbb96e21f'
'TXXX:MusicBrainz Release Track Id'                 '2ad89584-1f2e-4aa8-8caf-39ae63f38644'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:originalyear'                                 '2014'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.47 dB'
'TXXX:replaygain_track_peak'                        '0.626718'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'32672ba3-652a-44b8-b738-d8a9148308e0')

========================== row from database ==========================
                                              'id'  1237675
                                            'path'  /data/Music/Bulk/00instruments-classical/Opera Omnia/Unknown Album/04 Aria - More Palatino, BuxWV 247-Variatio 4.mp3
                                         'working'  None
                                         'bitrate'  251
                                    'duration_sec'  59
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  1942532
                                           'mtime'  1620574212
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Unknown Album 04 prerock classical classical instruments
                                      'tag_artist'  Dieterich Buxtehude; Ton Koopman, Amsterdam Baroque Orchestra, Amsterdam Baroque Choir
                                     'tag_release'  Opera Omnia
                                       'tag_title'  Aria. More Palatino, BuxWV 247: Variatio 4
                                             'bpm'  99.371
                                    'search_title'  '247':7,8 '4':10 'aria':1,2 'bux':11 'buxwv':6 'more':3 'palatino':4,5 'variatio':9 'wv':12
                                   'search_artist'  'amsterdam':7 'baroque':8 'buxtehude':2,3 'choir':11 'dieterich':1 'koopman':5,6 'orchestra':9,10 'ton':4
                                  'search_release'  'omnia':2 'opera':1
                                     'search_rest'  '00instruments':1 'album':4 'classical':2 'instruments':6 'prerock':5 'unknown':3
                                    'search_combo'  '00instruments':26 '247':7A,8A '4':10A 'album':29 'amsterdam':19B 'aria':1A,2A 'baroque':20B 'bux':11A 'buxtehude':14B,15B 'buxwv':6A 'choir':23B 'classical':27 'dieterich':13B 'instruments':31 'koopman':17B,18B 'more':3A 'omnia':25C 'opera':24C 'orchestra':21B,22B 'palatino':4A,5A 'prerock':30 'ton':16B 'unknown':28 'variatio':9A 'wv':12A
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  2014
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620574212.1074426  (2021-05-09 17:30:12)
                             'size'  1942532