======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '286'
                                          'artist'  'Rammstein'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Sonne (Tour Edition)'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-4', 'q-busy-4', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['industrial metal', 'german', 'industrial', 'metal', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'eid-ebm or industrial or darkwave'
                                             'bpm'  '99.7'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '99.7'
'TCON' (Content type, a.k.a. Genre)                 'eid-ebm or industrial or darkwave'
'TIT2' (Title/songname/content description)         'Sonne (Tour Edition)'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Rammstein'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['industrial metal', 'german', 'industrial', 'metal', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '4'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.65 dB'
'TXXX:replaygain_track_peak'                        '0.397575'

========================== row from database ==========================
                                              'id'  1303066
                                            'path'  /data/Music/Bulk/00poprockelectronic/Rammstein/Unknown/Rammstein - Sonne (Tour Edition).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  286
                                           'genre'  eid-ebm or industrial or darkwave
                                        'filesize'  4593173
                                           'mtime'  1620296960
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unknown eid ebm or industrial or darkwave
                                      'tag_artist'  Rammstein
                                     'tag_release'  None
                                       'tag_title'  Sonne (Tour Edition)
                                             'bpm'  99.7
                                    'search_title'  'edition':4,5 'sonne':1 'tour':2,3
                                   'search_artist'  'rammstein':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'darkwave':7 'ebm':4 'eid':3 'industrial':6 'or':5 'unknown':2
                                    'search_combo'  '00poprockelectronic':7 'darkwave':13 'ebm':10 'edition':4A,5A 'eid':9 'industrial':12 'or':11 'rammstein':6B 'sonne':1A 'tour':2A,3A 'unknown':8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-4', 'q-drums-3', 'q-syn-3', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-4', 'q-grit-4']
                                      'lastfmtags'  ['industrial metal', 'german', 'industrial', 'metal', 'rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620296960.1183276  (2021-05-06 12:29:20)
                             'size'  4593173