======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '315'
                                          'artist'  'Frank Zappa'
                                     'text_people'  ''
                                         'release'  'Hot Rats'
                                           'title'  'It Must Be a Camel'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-UNU-2', 'Q-OLDST-2', 'Q-JZFKS-1', "
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 "'q-chart-3', 'q-drums-3', 'q-other-3', 'q-vocals-1', 'q-mixbeat-2', "
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                                      'lastfmtags'  "['classic rock', 'jazz', 'progressive rock', 'experimental', 'rock']"
                                     'discogstags'  "['jazz', 'rock', 'fusion', 'jazz-rock', 'prog rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '6'
                                            'date'  '1987'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-experimental'
                                             'bpm'  '143.011'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '143.011'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-experimental'
'TDOR' (Original release time)                      '1969'
'TDRC' (Recording time)                             '1987'
'TIT2' (Title/songname/content description)         'It Must Be a Camel'
'TKEY' (Initial key)                                '8A'
'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)               '6/6'
'TSO2'                                              'Zappa, Frank'
'TSOP' (Performer sort order)                       'Zappa, Frank'
'TXXX:ASIN'                                         'B0000009N1'
'TXXX:BARCODE'                                      '0014431006623'
'TXXX:CATALOGNUMBER'                                'RCD 10066'
'TXXX:MusicBrainz Album Artist Id'                  'e20747e7-55a4-452e-8766-7b985585082d'
'TXXX:MusicBrainz Album Id'                         'bd527306-0dd8-4d99-93c4-4267ff649776'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'e20747e7-55a4-452e-8766-7b985585082d'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['jazz', 'rock', 'fusion', 'jazz-rock', 'prog rock']
'TXXX:lastfmtags'                                   ['classic rock', 'jazz', 'progressive rock', 'experimental', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.91 dB'
'TXXX:replaygain_track_peak'                        '0.663200'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'bdb5f88e-7f2a-4c55-8532-6f4db210e731')

========================== row from database ==========================
                                              'id'  472534
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Frank Zappa/1969 - Hot Rats/06 - It Must Be A Camel.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  315
                                           'genre'  ifs-songwriter-experimental
                                        'filesize'  7562940
                                           'mtime'  1636400797
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 1969 06 A ifs songwriter experimental
                                      'tag_artist'  Frank Zappa
                                     'tag_release'  Hot Rats
                                       'tag_title'  It Must Be a Camel
                                             'bpm'  143.011
                                    'search_title'  'a':4 'be':3 'camel':5 'it':1 'must':2
                                   'search_artist'  'frank':1 'zappa':2
                                  'search_release'  'hot':1 'rats':2
                                     'search_rest'  '00singer':1 '1969':4 'a':5 'eos':3 'experimental':7 'ifs':6 'songwriter':2
                                    'search_combo'  '00singer':10 '1969':13 'a':4A,14 'be':3A 'camel':5A 'eos':12 'experimental':16 'frank':6B 'hot':8C 'ifs':15 'it':1A 'must':2A 'rats':9C 'songwriter':11 'zappa':7B
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'Q-PIANO-3', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  ['classic rock', 'jazz', 'progressive rock', 'experimental', 'rock']
                                        'tag_date'  1987
                                     'discogstags'  ['jazz', 'rock', 'fusion', 'jazz-rock', 'prog rock']

============================== file details ==============================
                                           'mtime'  1636400797.236921  (2021-11-08 20:46:37)
                             'size'  7562940