======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '229'
                                          'artist'  'Filippa Giordano'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Va' Pensiero"
                                           'quals'  ("['Q-HAP-2', 'Q-OLDST-3', 'Q-LOCALNESS-2', 'Q-JZFKS-1', 'Q-UNU-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  ("['opera', 'female vocalists', 'classical', 'classical crossover', 'filippa "
 "giordano']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '94.064'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '94.064'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         "Va' Pensiero"
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Filippa Giordano'
'TPE2' (Band/orchestra/accompaniment)               'Filippa Giordano'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['opera',
 'female vocalists',
 'classical',
 'classical crossover',
 'filippa giordano']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+5.10 dB'
'TXXX:replaygain_track_peak'                        '0.286393'

========================== row from database ==========================
                                              'id'  1505660
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Filippa Giordano - Va_ Pensiero [].mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  229
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  5511719
                                           'mtime'  1637329820
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] Va_ [] prerock classical classical instruments
                                      'tag_artist'  Filippa Giordano
                                     'tag_release'  None
                                       'tag_title'  Va' Pensiero
                                             'bpm'  94.064
                                    'search_title'  'pensiero':3 'va':1,2
                                   'search_artist'  'filippa':1 'giordano':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'classical':9 'files':5,6 'instruments':10 'loose':3,4 'prerock':8 'unsorted':2 'va':7
                                    'search_combo'  '00poprockelectronic':6 'classical':14 'files':10,11 'filippa':4B 'giordano':5B 'instruments':15 'loose':8,9 'pensiero':3A 'prerock':13 'unsorted':7 'va':1A,2A,12
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-1', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['opera', 'female vocalists', 'classical', 'classical crossover', 'filippa giordano']
                                        'tag_date'  2008
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329819.7229064  (2021-11-19 14:50:19)
                             'size'  5511719