======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '178'
                                          'artist'  'Jascha Heifetz'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Serenata (d' Ambrosio) 1919"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'violin', 'classical', 'violin virtuoso']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1919'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '134.9'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '134.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1919'
'TIT2' (Title/songname/content description)         "Serenata (d' Ambrosio) 1919"
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '178000'
'TPE1' (Lead performer(s)/Soloist(s))               'Jascha Heifetz'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'violin', 'classical', 'violin virtuoso']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+2.40 dB'
'TXXX:replaygain_track_peak'                        '0.683868'

========================== row from database ==========================
                                              'id'  1497809
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/veryearly/1919/Jascha Heifetz violin - Serenata (d_ Ambrosio) 1919.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  178
                                           'genre'  prerock-unsorted
                                        'filesize'  3636030
                                           'mtime'  1621698477
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm veryearly violin (d_ prerock unsorted
                                      'tag_artist'  Jascha Heifetz
                                     'tag_release'  None
                                       'tag_title'  Serenata (d' Ambrosio) 1919
                                             'bpm'  134.9
                                    'search_title'  '1919':6 'ambrosio':4,5 'd':2,3 'serenata':1
                                   'search_artist'  'heifetz':2 'jascha':1
                                  'search_release'  
                                     'search_rest'  'd':3,4 'prerock':5 'unsorted':6 'veryearly':1 'violin':2
                                    'search_combo'  '1919':6A 'ambrosio':4A,5A 'd':2A,3A,11,12 'heifetz':8B 'jascha':7B 'prerock':13 'serenata':1A 'unsorted':14 'veryearly':9 'violin':10
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'violin', 'classical', 'violin virtuoso']
                                        'tag_date'  1919
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698477.3511872  (2021-05-22 17:47:57)
                             'size'  3636030