======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '505'
                                          'artist'  'Johann Sebastian Bach'
                                     'text_people'  ''
                                         'release'  ('Brandenburg Concertos Nos. 1-3 (Capella Istropolitana feat. conductor: '
 'Bohdan Warchal)')
                                           'title'  'Brandenburg Concerto No. 3 in G major, BWV 1048: I. (Allegro)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-2', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'composers', 'baroque', 'german', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  '9'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '145.580'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'APIC:Cover Image'                                  type PictureType.COVER_FRONT (Cover (front)) b'Cover Image'
                                     
'COMM:ID3v1 Comment:XXX'                            'Chillout; Romantic'
'COMM:Songs-DB_Custom2:eng'                         'Classic; Organ; Genius; Female Vocalists'
'COMM:Songs-DB_Custom3:eng'                         'German'
'COMM:Songs-DB_Occasion:eng'                        'Chillout; Romantic'
'POPM:Windows Media Player 9 Series'                POPM(email='Windows Media Player 9 Series', rating=128, count=0)
'TALB' (Album/Movie/Show title)                     ('Brandenburg Concertos Nos. 1-3 (Capella Istropolitana feat. conductor: '
 'Bohdan Warchal)')
'TBPM' (BPM (beats per minute))                     '145.580'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Brandenburg Concerto No. 3 in G major, BWV 1048: I. (Allegro)'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Johann Sebastian Bach'
'TPE2' (Band/orchestra/accompaniment)               'Johann Sebastian Bach'
'TRCK' (Track number/Position in set)               '8/9'
'TSOP' (Performer sort order)                       'Bach, Johann Sebastian'
'TXXX:ALBUMARTISTSORT'                              'Bach, Johann Sebastian'
'TXXX:ASIN'                                         'B0000013J5'
'TXXX:FMPS_Rating'                                  '0.4'
'TXXX:MP3GAIN_MINMAX'                               '076,196'
'TXXX:MusicBrainz Album Artist Id'                  '24f1766e-9635-4d58-a4d4-9413f9f98a4c'
'TXXX:MusicBrainz Album Id'                         'fe17ba37-9de6-4fcc-ac1c-6dbbaad9f47a'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '24f1766e-9635-4d58-a4d4-9413f9f98a4c'
'TXXX:MusicIP PUID'                                 '303acee1-15c5-3335-20bf-78bf00b70c84'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'composers', 'baroque', 'german', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+1.05 dB'
'TXXX:replaygain_track_peak'                        '0.785352'

========================== row from database ==========================
                                              'id'  1290465
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Bach__cifs1b54.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  505
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  10145955
                                           'mtime'  1620562003
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] Bach__cifs1b54 prerock classical classical instruments
                                      'tag_artist'  Johann Sebastian Bach
                                     'tag_release'  Brandenburg Concertos Nos. 1-3 (Capella Istropolitana feat. conductor: Bohdan Warchal)
                                       'tag_title'  Brandenburg Concerto No. 3 in G major, BWV 1048: I. (Allegro)
                                             'bpm'  145.58
                                    'search_title'  '1048':11,12 '3':5 'allegro':15,16 'brandenburg':1 'bwv':10 'concerto':2 'g':7 'i':13,14 'in':6 'major':8,9 'no':3,4
                                   'search_artist'  'bach':3 'johann':1 'sebastian':2
                                  'search_release'  '1':5 '13':7 '3':6 'bohdan':15 'brandenburg':1 'capella':8,9 'concertos':2 'conductor':13,14 'feat':11,12 'istropolitana':10 'nos':3,4 'warchal':16,17
                                     'search_rest'  '00poprockelectronic':1 'bach':7 'cifs1b54':8 'classical':10 'files':5,6 'instruments':11 'loose':3,4 'prerock':9 'unsorted':2
                                    'search_combo'  '00poprockelectronic':37 '1':24C '1048':11A,12A '13':26C '3':5A,25C 'allegro':15A,16A 'bach':19B,43 'bohdan':34C 'brandenburg':1A,20C 'bwv':10A 'capella':27C,28C 'cifs1b54':44 'classical':46 'concerto':2A 'concertos':21C 'conductor':32C,33C 'feat':30C,31C 'files':41,42 'g':7A 'i':13A,14A 'in':6A 'instruments':47 'istropolitana':29C 'johann':17B 'loose':39,40 'major':8A,9A 'no':3A,4A 'nos':22C,23C 'prerock':45 'sebastian':18B 'unsorted':38 'warchal':35C,36C
                                    'tag_tracknum'  8
                                      'num_images'  1
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'composers', 'baroque', 'german', 'classical']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562002.621086  (2021-05-09 14:06:42)
                             'size'  10145955