======================== unified (from filesystem) ========================
                                         'bitrate'  '166.24'
                                        'duration'  '188'
                                          'artist'  'Durante F.'
                                     'text_people'  ''
                                         'release'  'Aangenaam klassiek editie 1997'
                                           'title'  'Largo - Lamentationes Jeremiae'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '132.5'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Aangenaam klassiek editie 1997'
'TBPM' (BPM (beats per minute))                     '132.5'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         'Largo - Lamentationes Jeremiae'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Durante F.'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'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'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.59 dB'
'TXXX:replaygain_track_peak'                        '0.706064'

========================== row from database ==========================
                                              'id'  1213816
                                            'path'  /data/Music/Bulk/00instruments-classical/Durante F. - 15 - Largo - Lamentationes Jeremiae Prophetae.mp3
                                         'working'  None
                                         'bitrate'  166
                                    'duration_sec'  188
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  3922552
                                           'mtime'  1620561535
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 15 Prophetae prerock classical or classical instruments
                                      'tag_artist'  Durante F.
                                     'tag_release'  Aangenaam klassiek editie 1997
                                       'tag_title'  Largo - Lamentationes Jeremiae
                                             'bpm'  132.5
                                    'search_title'  'jeremiae':3 'lamentationes':2 'largo':1
                                   'search_artist'  'durante':1 'f':2,3
                                  'search_release'  '1997':4 'aangenaam':1 'editie':3 'klassiek':2
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':6 'or':5 'prerock':4 'prophetae':3
                                    'search_combo'  '00instruments':11 '1997':10C 'aangenaam':7C 'classical':12 'durante':4B 'editie':9C 'f':5B,6B 'instruments':16 'jeremiae':3A 'klassiek':8C 'lamentationes':2A 'largo':1A 'or':15 'prerock':14 'prophetae':13
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           '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-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1997
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561535.3005824  (2021-05-09 13:58:55)
                             'size'  3922552