======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '259'
                                          'artist'  'Mario Davidovsky'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Synchronism 1'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['contemporary classical', 'earwaves', 'electronic', 'argentinian', "
 "'experimental']")
                                     'discogstags'  "['contemporary', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '125.5'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '125.5'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TENC' (Encoded by)                                 'Lavf52.20.0'
'TIT2' (Title/songname/content description)         'Synchronism 1'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Mario Davidovsky'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['contemporary', 'classical']
'TXXX:lastfmtags'                                   ['contemporary classical',
 'earwaves',
 'electronic',
 'argentinian',
 'experimental']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.30 dB'
'TXXX:replaygain_track_peak'                        '0.470364'

========================== row from database ==========================
                                              'id'  766342
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Works/USE_17_Davidovsky_Synchronism_1.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  259
                                           'genre'  electronic-unsorted
                                        'filesize'  4155616
                                           'mtime'  1637933253
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Works USE_17_Davidovsky_Synchronism_1 electronic unsorted
                                      'tag_artist'  Mario Davidovsky
                                     'tag_release'  None
                                       'tag_title'  Synchronism 1
                                             'bpm'  125.5
                                    'search_title'  '1':2 'synchronism':1
                                   'search_artist'  'davidovsky':2 'mario':1
                                  'search_release'  
                                     'search_rest'  '1':6 '17':3 'davidovsky':4 'electronic':7 'synchronism':5 'unsorted':8 'use':2 'works':1
                                    'search_combo'  '1':2A,10 '17':7 'davidovsky':4B,8 'electronic':11 'mario':3B 'synchronism':1A,9 'unsorted':12 'use':6 'works':5
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['contemporary classical', 'earwaves', 'electronic', 'argentinian', 'experimental']
                                        'tag_date'  
                                     'discogstags'  ['contemporary', 'classical']

============================== file details ==============================
                                           'mtime'  1637933252.9701366  (2021-11-26 14:27:32)
                             'size'  4155616