======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '186'
                                          'artist'  'Charlotte Church'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Summertime (Opera: Porgy and Bess)'
                                           'quals'  ("['Q-HAP-2', 'Q-OLDST-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classical', 'opera', 'female vocalists', 'pop', 'christmas']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '19'
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '139.178'
                                             'key'  '8A'
                                        'acoustid'  '0c6d15a2-1866-4e54-9626-f11152eeccb0'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '139.178'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDOR' (Original release time)                      '2002'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'Summertime (Opera: Porgy and Bess)'
'TKEY' (Initial key)                                '8A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Charlotte Church'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Universal Records'
'TRCK' (Track number/Position in set)               '13/19'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Church, Charlotte'
'TXXX:Acoustid Id'                                  '0c6d15a2-1866-4e54-9626-f11152eeccb0'
'TXXX:Artists'                                      'Charlotte Church'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['classical', 'opera', 'female vocalists', 'pop', 'christmas']
'TXXX:originalyear'                                 '2002'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.49 dB'
'TXXX:replaygain_track_peak'                        '0.503381'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'cca78e10-8860-4fc4-823a-e0b971110b05')

========================== row from database ==========================
                                              'id'  1333214
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Porgy & Bess - Summertime - Charlotte Church.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  186
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  2983325
                                           'mtime'  1637329820
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] & prerock classical classical instruments
                                      'tag_artist'  Charlotte Church
                                     'tag_release'  None
                                       'tag_title'  Summertime (Opera: Porgy and Bess)
                                             'bpm'  139.178
                                    'search_title'  'and':5 'bess':6,7 'opera':2,3 'porgy':4 'summertime':1
                                   'search_artist'  'charlotte':1 'church':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'classical':8 'files':5,6 'instruments':9 'loose':3,4 'prerock':7 'unsorted':2
                                    'search_combo'  '00poprockelectronic':10 'and':5A 'bess':6A,7A 'charlotte':8B 'church':9B 'classical':17 'files':14,15 'instruments':18 'loose':12,13 'opera':2A,3A 'porgy':4A 'prerock':16 'summertime':1A 'unsorted':11
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['classical', 'opera', 'female vocalists', 'pop', 'christmas']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329820.1196175  (2021-11-19 14:50:20)
                             'size'  2983325