======================== unified (from filesystem) ========================
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                                        'duration'  '167'
                                          'artist'  'George Gershwin'
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                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '12'
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
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                                             'key'  '5B'
                                        'acoustid'  '5a933d7f-ced9-48cb-852c-045bea6fc7e8'
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'Gershwin Plays Gershwin: The Piano Rolls'
'TBPM' (BPM (beats per minute))                     '101'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDOR' (Original release time)                      '1993'
'TDRC' (Recording time)                             '1993-11-09'
'TIT2' (Title/songname/content description)         'That Certain Feeling'
'TKEY' (Initial key)                                '5B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'George Gershwin'
'TPE2' (Band/orchestra/accompaniment)               'George Gershwin'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Nonesuch'
'TRCK' (Track number/Position in set)               '3/12'
'TSO2'                                              'Gershwin, George'
'TSOP' (Performer sort order)                       'Gershwin, George'
'TXXX:ASIN'                                         'B000005J1I'
'TXXX:Acoustid Id'                                  '5a933d7f-ced9-48cb-852c-045bea6fc7e8'
'TXXX:Artists'                                      'George Gershwin'
'TXXX:BARCODE'                                      '075597928723'
'TXXX:CATALOGNUMBER'                                '79287'
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'TXXX:MusicBrainz Album Id'                         'b7cfa186-8a33-4695-ad93-9087d148cd41'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '65744963-191a-44ef-a3c7-b693a808a158'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['composers', 'piano', 'jazz', 'composer', 'classical']
'TXXX:originalyear'                                 '1993'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.45 dB'
'TXXX:replaygain_track_peak'                        '0.751049'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'21f526f5-2b67-4aa6-a7e4-982f87be109a')

========================== row from database ==========================
                                              'id'  463935
                                            'path'  /data/Music/Bulk/00instruments-classical/George Gershwin/Gershwin Plays Gershwin - The/03 That Certain Feeling.mp3
                                         'working'  None
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                                    'duration_sec'  167
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  5398789
                                           'mtime'  1620574170
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 03 prerock jb jazz unsorted
                                      'tag_artist'  George Gershwin
                                     'tag_release'  Gershwin Plays Gershwin: The Piano Rolls
                                       'tag_title'  That Certain Feeling
                                             'bpm'  101.0
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                                   'search_artist'  'george':1 'gershwin':2
                                  'search_release'  'gershwin':1,3 'piano':5 'plays':2 'rolls':6 'the':4
                                     'search_rest'  '00instruments':1 'classical':2 'jazz':5 'jb':4 'prerock':3 'unsorted':6
                                    'search_combo'  '00instruments':12 'certain':2A 'classical':13 'feeling':3A 'george':4B 'gershwin':5B,6C,8C 'jazz':16 'jb':15 'piano':10C 'plays':7C 'prerock':14 'rolls':11C 'that':1A 'the':9C 'unsorted':17
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['composers', 'piano', 'jazz', 'composer', 'classical']
                                        'tag_date'  1993
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620574169.7932994  (2021-05-09 17:29:29)
                             'size'  5398789