======================== unified (from filesystem) ========================
                                         'bitrate'  '163.488'
                                        'duration'  '310'
                                          'artist'  'Rammstein'
                                     'text_people'  ''
                                         'release'  'Seemann'
                                           'title'  'Der Meister'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['industrial metal', 'german', 'industrial', 'metal', 'rock']"
                                     'discogstags'  "['electronic', 'industrial']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'eid-metal-industrial'
                                             'bpm'  '129.979'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Seemann'
'TBPM' (BPM (beats per minute))                     '129.979'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-industrial'
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         'Der Meister'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Rammstein'
'TPE2' (Band/orchestra/accompaniment)               'Rammstein'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Encoder'                                      'MPEGPlus (Stream 7, Profile Unknown)'
'TXXX:Fmps_playcount'                               '1'
'TXXX:Fmps_rating'                                  '0.6'
'TXXX:Fmps_rating_amarok_score'                     '0.25'
'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:Rating'                                       '51'
'TXXX:discogstags'                                  ['electronic', 'industrial']
'TXXX:lastfmtags'                                   ['industrial metal', 'german', 'industrial', 'metal', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-2.21 dB'
'TXXX:replaygain_track_peak'                        '0.650322'

========================== row from database ==========================
                                              'id'  1400106
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Rammstein/02. Der Meister.mp3
                                         'working'  None
                                         'bitrate'  163
                                    'duration_sec'  310
                                           'genre'  eid-metal-industrial
                                        'filesize'  6345580
                                           'mtime'  1620311078
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 02. eid metal industrial
                                      'tag_artist'  Rammstein
                                     'tag_release'  Seemann
                                       'tag_title'  Der Meister
                                             'bpm'  129.979
                                    'search_title'  'der':1 'meister':2
                                   'search_artist'  'rammstein':1
                                  'search_release'  'seemann':1
                                     'search_rest'  '00dwimp':1 '00metal':2 '02':3,4 'eid':5 'industrial':7 'metal':6
                                    'search_combo'  '00dwimp':5 '00metal':6 '02':7,8 'der':1A 'eid':9 'industrial':11 'meister':2A 'metal':10 'rammstein':3B 'seemann':4C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  7A
                                           '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-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-4', 'q-grit-4']
                                      'lastfmtags'  ['industrial metal', 'german', 'industrial', 'metal', 'rock']
                                        'tag_date'  1996
                                     'discogstags'  ['electronic', 'industrial']

============================== file details ==============================
                                           'mtime'  1620311077.5338886  (2021-05-06 16:24:37)
                             'size'  6345580