======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '93'
                                          'artist'  'felix kubin'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'useless introduction'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', "
 "'Q-OLDST-4', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['avant garde', 'electroclash', 'electro', 'electronic', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-we-electroclash'
                                             'bpm'  '119.7'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '119.7'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-electroclash'
'TIT2' (Title/songname/content description)         'useless introduction'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'felix kubin'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '4'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['avant garde', 'electroclash', 'electro', 'electronic', 'experimental']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'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'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+4.44 dB'
'TXXX:replaygain_track_peak'                        '0.987399'

========================== row from database ==========================
                                              'id'  1334406
                                            'path'  /data/Music/Bulk/00poprockelectronic/Felix Kubin/felix kubin - useless introduction.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  93
                                           'genre'  electronic-we-electroclash
                                        'filesize'  1494217
                                           'mtime'  1620569497
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Felix Kubin electronic we electroclash
                                      'tag_artist'  felix kubin
                                     'tag_release'  None
                                       'tag_title'  useless introduction
                                             'bpm'  119.7
                                    'search_title'  'introduction':2 'useless':1
                                   'search_artist'  'felix':1 'kubin':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'electroclash':6 'electronic':4 'felix':2 'kubin':3 'we':5
                                    'search_combo'  '00poprockelectronic':5 'electroclash':10 'electronic':8 'felix':3B,6 'introduction':2A 'kubin':4B,7 'useless':1A 'we':9
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-4', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['avant garde', 'electroclash', 'electro', 'electronic', 'experimental']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620569496.6068966  (2021-05-09 16:11:36)
                             'size'  1494217