======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '328'
                                          'artist'  'Pollyester'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Round Clocks'
                                           'quals'  ("['Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', "
 "'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-2']")
                                      'lastfmtags'  "['indie', 'metadisco', 'alternative rock', 'new wave', 'electronic']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '127.3'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '127.3'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         'Round Clocks'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Pollyester'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['indie', 'metadisco', 'alternative rock', 'new wave', 'electronic']
'TXXX:q-bass'                                       '4'
'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'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-2.62 dB'
'TXXX:replaygain_track_peak'                        '0.714885'

========================== row from database ==========================
                                              'id'  764180
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Elektronikzeugs/Pollyester - Round Clocks.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  328
                                           'genre'  electronic-unsorted
                                        'filesize'  5252501
                                           'mtime'  1620536675
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Elektronikzeugs electronic unsorted
                                      'tag_artist'  Pollyester
                                     'tag_release'  None
                                       'tag_title'  Round Clocks
                                             'bpm'  127.3
                                    'search_title'  'clocks':2 'round':1
                                   'search_artist'  'pollyester':1
                                  'search_release'  
                                     'search_rest'  'electronic':2 'elektronikzeugs':1 'unsorted':3
                                    'search_combo'  'clocks':2A 'electronic':5 'elektronikzeugs':4 'pollyester':3B 'round':1A 'unsorted':6
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', '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-3', 'q-chart-2', 'q-other-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'metadisco', 'alternative rock', 'new wave', 'electronic']
                                        'tag_date'  2010
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620536675.3689163  (2021-05-09 07:04:35)
                             'size'  5252501