======================== unified (from filesystem) ========================
                                         'bitrate'  '183.479'
                                        'duration'  '272'
                                          'artist'  'Rammstein'
                                     'text_people'  ''
                                         'release'  'Mutter, Limited Tour Edition'
                                           'title'  'Mutter'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['industrial metal', 'german', 'industrial', 'metal', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'eid-metal-industrial'
                                             'bpm'  '115.788'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Mutter, Limited Tour Edition'
'TBPM' (BPM (beats per minute))                     '115.788'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-industrial'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'Mutter'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Rammstein'
'TPE2' (Band/orchestra/accompaniment)               'Rammstein'
'TRCK' (Track number/Position in set)               '6'
'TXXX:Encoder'                                      'MPEGPlus (Stream 7, Profile Unknown)'
'TXXX:Fmps_playcount'                               '1'
'TXXX:Fmps_rating'                                  '0.6'
'TXXX:Fmps_rating_amarok_score'                     '0.21'
'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'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.65 dB'
'TXXX:replaygain_track_peak'                        '0.403460'

========================== row from database ==========================
                                              'id'  1392352
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Rammstein/04. Mutter, Limited Tour Edition (2001) [MPC.Q10]/06. Mutter.mp3
                                         'working'  None
                                         'bitrate'  183
                                    'duration_sec'  272
                                           'genre'  eid-metal-industrial
                                        'filesize'  6255961
                                           'mtime'  1620311083
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 04. (2001) [MPC.Q10] 06. eid metal industrial
                                      'tag_artist'  Rammstein
                                     'tag_release'  Mutter, Limited Tour Edition
                                       'tag_title'  Mutter
                                             'bpm'  115.788
                                    'search_title'  'mutter':1
                                   'search_artist'  'rammstein':1
                                  'search_release'  'edition':5 'limited':3 'mutter':1,2 'tour':4
                                     'search_rest'  '00dwimp':1 '00metal':2 '04':3,4 '06':10,11 '2001':5,6 'eid':12 'industrial':14 'metal':13 'mpc':7 'mpcq10':9 'q10':8
                                    'search_combo'  '00dwimp':8 '00metal':9 '04':10,11 '06':17,18 '2001':12,13 'edition':7C 'eid':19 'industrial':21 'limited':5C 'metal':20 'mpc':14 'mpcq10':16 'mutter':1A,3C,4C 'q10':15 'rammstein':2B 'tour':6C
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-4', 'q-other-4', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['industrial metal', 'german', 'industrial', 'metal', 'rock']
                                        'tag_date'  2001
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620311083.2732637  (2021-05-06 16:24:43)
                             'size'  6255961