======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '253'
                                          'artist'  'Kevyn Lettau'
                                     'text_people'  'Sting'
                                         'release'  'The Police'
                                           'title'  'Every Breath You Take'
                                           'quals'  ("['Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'q-syn-2', "
 "'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-4', "
 "'q-other-2', 'q-piano-1', 'q-vocals-2', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['jazz', 'female vocalists', 'new age', 'brazilian', 'sailing smooth']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'prerock-jb'
                                             'bpm'  '117.398'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '101-03'
'COMM:MusicMatch_Preference:eng'                    '101-03'
'COMM:iTunNORM:eng'                                 (' 00000340 0000037F 00003137 00003222 00021356 00021356 00008000 00008000 '
 '00000017 00000017')
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'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
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'PRIV:WM/WMCollectionGroupID:4nË\x01>QæC²¥sQZ\x00\x02*'  PRIV(owner='WM/WMCollectionGroupID', data=b'4n\xcb\x01>Q\xe6C\xb2\xa5sQZ\x00\x02*')
'PRIV:WM/WMCollectionID:4nË\x01>QæC²¥sQZ\x00\x02*'  PRIV(owner='WM/WMCollectionID', data=b'4n\xcb\x01>Q\xe6C\xb2\xa5sQZ\x00\x02*')
'PRIV:WM/WMContentID:r¹\x92·yßoF\x82K\x85^\x7f\x1dG\\'  PRIV(owner='WM/WMContentID', data=b'r\xb9\x92\xb7y\xdfoF\x82K\x85^\x7f\x1dG\\')
'TALB' (Album/Movie/Show title)                     'The Police'
'TBPM' (BPM (beats per minute))                     '117.398'
'TCOM' (Composer)                                   'Sting'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Every Breath You Take'
'TKEY' (Initial key)                                '4A'
'TLEN' (Length)                                     '253000'
'TPE1' (Lead performer(s)/Soloist(s))               'Sting & The Police'
'TPE2' (Band/orchestra/accompaniment)               'Kevyn Lettau'
'TPUB' (Publisher)                                  'Universal'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'female vocalists', 'new age', 'brazilian', 'sailing smooth']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.87 dB'
'TXXX:replaygain_track_peak'                        '0.646583'

========================== row from database ==========================
                                              'id'  1317488
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/10 - every breath you take.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  253
                                           'genre'  prerock-jb
                                        'filesize'  4054357
                                           'mtime'  1630249717
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 10 every breath you take prerock jb
                                      'tag_artist'  Kevyn Lettau
                                     'tag_release'  The Police
                                       'tag_title'  Every Breath You Take
                                             'bpm'  117.398
                                    'search_title'  'breath':2 'every':1 'take':4 'you':3
                                   'search_artist'  'kevyn':1 'lettau':2
                                  'search_release'  'police':2 'the':1
                                     'search_rest'  '00poprockelectronic':1 'breath':8 'every':7 'files':5,6 'jb':12 'loose':3,4 'prerock':11 'take':10 'unsorted':2 'you':9
                                    'search_combo'  '00poprockelectronic':9 'breath':2A,16 'every':1A,15 'files':13,14 'jb':20 'kevyn':5B 'lettau':6B 'loose':11,12 'police':8C 'prerock':19 'take':4A,18 'the':7C 'unsorted':10 'you':3A,17
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['jazz', 'female vocalists', 'new age', 'brazilian', 'sailing smooth']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1630249716.8274338  (2021-08-29 17:08:36)
                             'size'  4054357