======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '239'
                                          'artist'  'George Frideric Handel'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Hornpipe'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'q-syn-1', 'q-bass-1', "
 "'q-busy-2', 'q-grit-2', 'q-play-2', 'Q-OLDST-1', 'q-chart-3', 'q-drums-1', "
 "'q-other-4', 'q-piano-1', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['classical', 'baroque', 'german', 'composers', 'instrumental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '117.535'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '117.535'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Hornpipe'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'George Frideric Handel'
'TRCK' (Track number/Position in set)               '7'
'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'                                   ['classical', 'baroque', 'german', 'composers', 'instrumental']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.78 dB'
'TXXX:replaygain_track_peak'                        '0.740947'

========================== row from database ==========================
                                              'id'  194848
                                            'path'  /data/Music/Bulk/00instruments-classical/Unsorted/George Frideric Handel__cifs48ae.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  239
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  3841301
                                           'mtime'  1620561859
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Unsorted Handel__cifs48ae prerock classical classical instruments
                                      'tag_artist'  George Frideric Handel
                                     'tag_release'  None
                                       'tag_title'  Hornpipe
                                             'bpm'  117.535
                                    'search_title'  'hornpipe':1
                                   'search_artist'  'frideric':2 'george':1 'handel':3
                                  'search_release'  
                                     'search_rest'  '00instruments':1 'cifs48ae':5 'classical':2 'handel':4 'instruments':7 'prerock':6 'unsorted':3
                                    'search_combo'  '00instruments':5 'cifs48ae':9 'classical':6 'frideric':3B 'george':2B 'handel':4B,8 'hornpipe':1A 'instruments':11 'prerock':10 'unsorted':7
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['classical', 'baroque', 'german', 'composers', 'instrumental']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561859.2285466  (2021-05-09 14:04:19)
                             'size'  3841301