======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '272'
                                          'artist'  'Rammstein'
                                     'text_people'  'Günter Joseck'
                                         'release'  'Mutter'
                                           'title'  'Sonne'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-3', 'q-busy-4', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['industrial metal', 'german', 'industrial', 'metal', 'rock']"
                                     'discogstags'  "['electronic', 'rock', 'industrial', 'goth rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '11'
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'eid-ebm or industrial or darkwave'
                                             'bpm'  '100.5'
                                             'key'  '10A'
                                        'acoustid'  'f3498d20-69ca-421c-b010-2a506934cd41'
rest: ''

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

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'PRIV:AverageLevel:{)\x00\x00'                      PRIV(owner='AverageLevel', data=b'{)\x00\x00')
'PRIV:PeakValue:¡\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xa1\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     'Mutter'
'TBPM' (BPM (beats per minute))                     '100.5'
'TCOM' (Composer)                                   'Rammstein'
'TCON' (Content type, a.k.a. Genre)                 'eid-ebm or industrial or darkwave'
'TDOR' (Original release time)                      '2001'
'TDRC' (Recording time)                             '2001-10-29'
'TEXT' (Lyricist/Text writer)                       'Rammstein'
'TIPL' (Involved people list)                       TIPL(encoding=<Encoding.UTF16: 1>, people=[['producer', 'Jacob Hellner'], ['producer', 'Rammstein'], ['engineer', 'Ulf Kruckenberg'], ['engineer', 'Myriam Corrège'], ['mix', 'Stefan Glaumann'], ['bass guitar', 'Oliver Riedel'], ['orchestra', 'Deutsches Filmorchester Babelsberg'], ['drums', 'Christoph Schneider'], ['vocal', 'Till Lindemann'], ['keyboard', 'Christian Lorenz'], ['guitars', 'Richard Z. Kruspe'], ['guitars', 'Paul Landers']])
'TIT2' (Title/songname/content description)         'Sonne'
'TKEY' (Initial key)                                '10A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Rammstein'
'TPE2' (Band/orchestra/accompaniment)               'Rammstein'
'TPE3' (Conductor/performer refinement)             'Günter Joseck'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'Motor Music'
'TRCK' (Track number/Position in set)               '3/11'
'TSO2'                                              'Rammstein'
'TSOP' (Performer sort order)                       'Rammstein'
'TSRC' (ISRC (international standard recording code))  'DEN120003766'
'TXXX:ASIN'                                         'B00005QHSS'
'TXXX:Acoustid Id'                                  'f3498d20-69ca-421c-b010-2a506934cd41'
'TXXX:BARCODE'                                      '731458936725'
'TXXX:CATALOGNUMBER'                                '589 367-2'
'TXXX:MusicBrainz Album Artist Id'                  'b2d122f9-eadb-4930-a196-8f221eeb0c66'
'TXXX:MusicBrainz Album Id'                         '9da5a7f9-bb2b-3421-bf82-29b4f124c6b3'
'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'b2d122f9-eadb-4930-a196-8f221eeb0c66'
'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:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['electronic', 'rock', 'industrial', 'goth rock']
'TXXX:lastfmtags'                                   ['industrial metal', 'german', 'industrial', 'metal', 'rock']
'TXXX:q-bass'                                       '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.37 dB'
'TXXX:replaygain_track_peak'                        '0.460792'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'f8030bcd-e6e4-48cb-ba0d-58b3a1132ad4')

========================== row from database ==========================
                                              'id'  1291316
                                            'path'  /data/Music/Bulk/00poprockelectronic/Rammstein/Mutter/Rammstein - Sonne - 03.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  272
                                           'genre'  eid-ebm or industrial or darkwave
                                        'filesize'  4372264
                                           'mtime'  1620296960
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 03 eid ebm or industrial or darkwave
                                      'tag_artist'  Rammstein
                                     'tag_release'  Mutter
                                       'tag_title'  Sonne
                                             'bpm'  100.5
                                    'search_title'  'sonne':1
                                   'search_artist'  'rammstein':1
                                  'search_release'  'mutter':1
                                     'search_rest'  '00poprockelectronic':1 'darkwave':6 'ebm':3 'eid':2 'industrial':5 'or':4
                                    'search_combo'  '00poprockelectronic':4 'darkwave':9 'ebm':6 'eid':5 'industrial':8 'mutter':3C 'or':7 'rammstein':2B 'sonne':1A
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-grit-4']
                                      'lastfmtags'  ['industrial metal', 'german', 'industrial', 'metal', 'rock']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic', 'rock', 'industrial', 'goth rock']

============================== file details ==============================
                                           'mtime'  1620296959.9470267  (2021-05-06 12:29:19)
                             'size'  4372264