======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '218'
                                          'artist'  'Rammstein'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'Halleluja'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-4', 'q-busy-2', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', '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'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'soundtrack-video'
                                             'bpm'  '129.813'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '129.813'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-video'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Halleluja'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Rammstein'
'TSOP' (Performer sort order)                       'Rammstein'
'TXXX:Artists'                                      'Rammstein'
'TXXX:MP3GAIN_MINMAX'                               '027,203'
'TXXX:MP3GAIN_UNDO'                                 '+007,+007,N'
'TXXX:MusicBrainz Artist Id'                        'b2d122f9-eadb-4930-a196-8f221eeb0c66'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['industrial metal', 'german', 'industrial', 'metal', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'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'                        '-0.35 dB'
'TXXX:replaygain_track_peak'                        '0.353990'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'645f0d45-6bf7-4711-95e6-9cdd1baa6d11')

========================== row from database ==========================
                                              'id'  793290
                                            'path'  /data/Music/Bulk/0soundtrack/Resident Evil OST/09 -Rammstein - Halleluja.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  218
                                           'genre'  soundtrack-video
                                        'filesize'  5256430
                                           'mtime'  1620524620
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Resident Evil OST 09 soundtrack video
                                      'tag_artist'  Rammstein
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Halleluja
                                             'bpm'  129.813
                                    'search_title'  'halleluja':1
                                   'search_artist'  'rammstein':1
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '0soundtrack':1 'evil':3 'ost':4 'resident':2 'soundtrack':5 'video':6
                                    'search_combo'  '0soundtrack':8 'album':4C 'evil':10 'halleluja':1A 'non':3C 'nonalbum':5C 'ost':11 'rammstein':2B 'resident':9 'soundtrack':12 'tracks':6C,7C 'video':13
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-4']
                                      'lastfmtags'  ['industrial metal', 'german', 'industrial', 'metal', 'rock']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524620.0576897  (2021-05-09 03:43:40)
                             'size'  5256430