======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '319'
                                          'artist'  'Franz Liszt; Michele Campanella'
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                                         'release'  'Complete Hungarian Rhapsodies'
                                           'title'  'Hungarian Rhapsody no. 3 in B-flat major, S. 244'
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '9'
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '155'
                                             'key'  '6B'
                                        'acoustid'  'a9ccfc19-567f-4529-8056-ca5fbc2272ba'
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======================== rawer (from filesystem) ========================

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Complete Hungarian Rhapsodies'
'TBPM' (BPM (beats per minute))                     '155'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDOR' (Original release time)                      '1974'
'TDRC' (Recording time)                             '1993'
'TIT2' (Title/songname/content description)         'Hungarian Rhapsody no. 3 in B-flat major, S. 244'
'TKEY' (Initial key)                                '6B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Franz Liszt'
'TPE2' (Band/orchestra/accompaniment)               'Franz Liszt; Michele Campanella'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'Philips'
'TRCK' (Track number/Position in set)               '3/9'
'TSO2'                                              'Liszt, Franz; Campanella, Michele'
'TSOP' (Performer sort order)                       'Liszt, Franz'
'TSRC' (ISRC (international standard recording code))  'NLA507200021'
'TXXX:ASIN'                                         'B00000416M'
'TXXX:Acoustid Id'                                  'a9ccfc19-567f-4529-8056-ca5fbc2272ba'
'TXXX:Artists'                                      'Franz Liszt'
'TXXX:BARCODE'                                      '028943837125'
'TXXX:CATALOGNUMBER'                                '00289 438 3712'
'TXXX:MusicBrainz Album Artist Id'                  '2cd475bb-1abd-40c4-9904-6d4b691c752c/d60cfc45-ad65-4e33-b78b-36028a38548b'
'TXXX:MusicBrainz Album Id'                         '7bed9790-5c40-4274-b6a4-ec8a3732fa99'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '2cd475bb-1abd-40c4-9904-6d4b691c752c'
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'TXXX:MusicBrainz Release Track Id'                 'b740211c-28e6-3bd8-8aca-2e5772ebe8e5'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:mood'                                         'Acoustic/Relaxed/Not happy/Not party/Not aggressive/Not electronic/Sad'
'TXXX:originalyear'                                 '1974'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '4'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.71 dB'
'TXXX:replaygain_track_peak'                        '0.911475'
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========================== row from database ==========================
                                              'id'  1213805
                                            'path'  /data/Music/Bulk/00instruments-classical/Liszt/Complete Hungarian Rhapsodies/Franz Liszt - No. 03 in B flat.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  319
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  5158413
                                           'mtime'  1620574189
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical No. 03 prerock classical classical instruments
                                      'tag_artist'  Franz Liszt; Michele Campanella
                                     'tag_release'  Complete Hungarian Rhapsodies
                                       'tag_title'  Hungarian Rhapsody no. 3 in B-flat major, S. 244
                                             'bpm'  155.0
                                    'search_title'  '244':14 '3':5 'b':7 'bflat':9 'flat':8 'hungarian':1 'in':6 'major':10,11 'no':3,4 'rhapsody':2 's':12,13
                                   'search_artist'  'campanella':5 'franz':1 'liszt':2,3 'michele':4
                                  'search_release'  'complete':1 'hungarian':2 'rhapsodies':3
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':6 'no':3,4 'prerock':5
                                    'search_combo'  '00instruments':23 '244':14A '3':5A 'b':7A 'bflat':9A 'campanella':19B 'classical':24 'complete':20C 'flat':8A 'franz':15B 'hungarian':1A,21C 'in':6A 'instruments':28 'liszt':16B,17B 'major':10A,11A 'michele':18B 'no':3A,4A,25,26 'prerock':27 'rhapsodies':22C 'rhapsody':2A 's':12A,13A
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-4', 'q-mixbeat-1', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1993
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620574188.5147848  (2021-05-09 17:29:48)
                             'size'  5158413