======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '208'
                                          'artist'  'Frank Zappa'
                                     'text_people'  ''
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                                           'title'  'The Central Scrutinizer'
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 "'q-chart-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
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                                      'lastfmtags'  "['classic rock', 'jazz', 'progressive rock', 'experimental', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '9'
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'rock-cppex-experimental or noise'
                                             'bpm'  '106'
                                             'key'  '7A'
                                        'acoustid'  'fcde521c-2070-4b71-85ca-4fab5fe3620e'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '106'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-experimental or noise'
'TDOR' (Original release time)                      '1979'
'TDRC' (Recording time)                             '2002-04-27'
'TIT2' (Title/songname/content description)         'The Central Scrutinizer'
'TKEY' (Initial key)                                '7A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Frank Zappa'
'TPE2' (Band/orchestra/accompaniment)               'Frank Zappa'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Rykodisc'
'TRCK' (Track number/Position in set)               '1/9'
'TSO2'                                              'Zappa, Frank'
'TSOP' (Performer sort order)                       'Zappa, Frank'
'TXXX:Acoustid Id'                                  'fcde521c-2070-4b71-85ca-4fab5fe3620e'
'TXXX:Artists'                                      'Frank Zappa'
'TXXX:BARCODE'                                      '4988112413238'
'TXXX:CATALOGNUMBER'                                'VACK-1238'
'TXXX:MusicBrainz Album Artist Id'                  'e20747e7-55a4-452e-8766-7b985585082d'
'TXXX:MusicBrainz Album Id'                         '3cfc26be-7131-43ec-84aa-6a653a971c58'
'TXXX:MusicBrainz Album Status'                     'promotion'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'e20747e7-55a4-452e-8766-7b985585082d'
'TXXX:MusicBrainz Release Group Id'                 '2cd0a4d2-ec35-35dd-bcae-8310a6fff168'
'TXXX:MusicBrainz Release Track Id'                 '7d7f3a36-76a4-4800-a60e-e8bff3116818'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classic rock', 'jazz', 'progressive rock', 'experimental', 'rock']
'TXXX:originalyear'                                 '1979'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+3.91 dB'
'TXXX:replaygain_track_peak'                        '0.592983'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'b9bf271e-d783-4e4c-8f8b-7078d96232a1')

========================== row from database ==========================
                                              'id'  1522945
                                            'path'  /data/Music/Bulk/00poprockelectronic/Frank Zappa/Joe_s Garage/Zappa, frank - Joe_s Garage (cd1) - 01 - Central Scrutinizer.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  208
                                           'genre'  rock-cppex-experimental or noise
                                        'filesize'  3333944
                                           'mtime'  1636757598
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Joe_s Zappa, frank Joe_s (cd1) 01 rock cppex experimental or noise
                                      'tag_artist'  Frank Zappa
                                     'tag_release'  Joe's Garage: Act I
                                       'tag_title'  The Central Scrutinizer
                                             'bpm'  106.0
                                    'search_title'  'central':2 'scrutinizer':3 'the':1
                                   'search_artist'  'frank':1 'zappa':2
                                  'search_release'  'act':6 'garage':4,5 'i':7 'joe':1 'joes':3 's':2
                                     'search_rest'  '00poprockelectronic':1 'cd1':7,8 'cppex':10 'experimental':11 'frank':6 'joe':2 'noise':13 'or':12 'rock':9 's':3 'zappa':4,5
                                    'search_combo'  '00poprockelectronic':13 'act':11C 'cd1':19,20 'central':2A 'cppex':22 'experimental':23 'frank':4B,18 'garage':9C,10C 'i':12C 'joe':6C,14 'joes':8C 'noise':25 'or':24 'rock':21 's':7C,15 'scrutinizer':3A 'the':1A 'zappa':5B,16,17
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-2', 'q-bass-1', 'q-grit-3']
                                      'lastfmtags'  ['classic rock', 'jazz', 'progressive rock', 'experimental', 'rock']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636757598.0715168  (2021-11-12 23:53:18)
                             'size'  3333944