======================== unified (from filesystem) ========================
                                         'bitrate'  '224.0'
                                        'duration'  '159'
                                          'artist'  'Bert Kaempfert'
                                     'text_people'  ''
                                         'release'  'Live In London'
                                           'title'  "Tree O'Clock In The Morning"
                                           'quals'  ("['Q-OLDST-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', 'Q-LOCALNESS-2', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'german', 'jazz', 'swing', 'easy listening']"
                                     'discogstags'  "['big band', 'easy listening', 'jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '12'
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'prerock-jb'
                                             'bpm'  '138.987'
                                             'key'  '3B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 0000011A 00000166 000012DE'
'COMM:iTunNORM:eng'                                 (' 0000011A 00000166 000012DE 00001721 0001013B 0001013B 00007640 000072F0 '
 '00015596 0001013B')
'PRIV:AverageLevel:9\r\x00\x00'                     PRIV(owner='AverageLevel', data=b'9\r\x00\x00')
'PRIV:PeakValue:\x9cs\x00\x00'                      PRIV(owner='PeakValue', data=b'\x9cs\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'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')
'TALB' (Album/Movie/Show title)                     'Live In London'
'TBPM' (BPM (beats per minute))                     '138.987'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb'
'TDRC' (Recording time)                             '1975'
'TIT2' (Title/songname/content description)         "Tree O'Clock In The Morning"
'TKEY' (Initial key)                                '3B'
'TPE1' (Lead performer(s)/Soloist(s))               'Bert Kaempfert'
'TPE2' (Band/orchestra/accompaniment)               'Bert Kaempfert'
'TRCK' (Track number/Position in set)               '6/12'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['big band', 'easy listening', 'jazz']
'TXXX:lastfmtags'                                   ['instrumental', 'german', 'jazz', 'swing', 'easy listening']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.53 dB'
'TXXX:replaygain_track_peak'                        '2.026216'

========================== row from database ==========================
                                              'id'  1517476
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/bert kaempfert - three o_clock in the morning(3)5.mp3
                                         'working'  None
                                         'bitrate'  224
                                    'duration_sec'  159
                                           'genre'  prerock-jb
                                        'filesize'  4527954
                                           'mtime'  1630249724
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] bert kaempfert three o_clock the morning(3)5 prerock jb
                                      'tag_artist'  Bert Kaempfert
                                     'tag_release'  Live In London
                                       'tag_title'  Tree O'Clock In The Morning
                                             'bpm'  138.987
                                    'search_title'  'clock':3 'in':5 'morning':7 'o':2 'oclock':4 'the':6 'tree':1
                                   'search_artist'  'bert':1 'kaempfert':2
                                  'search_release'  'in':2 'live':1 'london':3
                                     'search_rest'  '00poprockelectronic':1 '3':14 '5':15 'bert':7 'clock':11 'files':5,6 'jb':18 'kaempfert':8 'loose':3,4 'morning':13 'morning35':16 'o':10 'prerock':17 'the':12 'three':9 'unsorted':2
                                    'search_combo'  '00poprockelectronic':13 '3':26 '5':27 'bert':8B,19 'clock':3A,23 'files':17,18 'in':5A,11C 'jb':30 'kaempfert':9B,20 'live':10C 'london':12C 'loose':15,16 'morning':7A,25 'morning35':28 'o':2A,22 'oclock':4A 'prerock':29 'the':6A,24 'three':21 'tree':1A 'unsorted':14
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  3B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'german', 'jazz', 'swing', 'easy listening']
                                        'tag_date'  1975
                                     'discogstags'  ['big band', 'easy listening', 'jazz']

============================== file details ==============================
                                           'mtime'  1630249723.7162466  (2021-08-29 17:08:43)
                             'size'  4527954