<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '198'
                                          'artist'  'The Mothers of Invention'
                                     'text_people'  'Frank Zappa'
                                         'release'  "We're Only in It for the Money"
                                           'title'  'The Idiot Bastard Son'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['experimental rock', 'avant garde', 'progressive rock', 'experimental', "
 "'rock']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  ''
                                            'date'  '1968'
                                        'comments'  ''
                                           'genre'  'rock-cppex-experimental or noise'
                                             'bpm'  '122.141'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f95382dae80>

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'PRIV:PeakValue:\x9dv\x00\x00'                      PRIV(owner='PeakValue', data=b'\x9dv\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')
'PRIV:WM/Provider:A\x00M\x00G\x00\x00\x00'          PRIV(owner='WM/Provider', data=b'A\x00M\x00G\x00\x00\x00')
'PRIV:WM/UniqueFileIdentifier:A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x00 \x002\x002\x006\x003\x001\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x007\x004\x007\x009\x006\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x00 \x003\x006\x005\x005\x005\x001\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x00 \x002\x002\x006\x003\x001\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x007\x004\x007\x009\x006\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x00 \x003\x006\x005\x005\x005\x001\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:j\x0b@´\x0cX_L\x91~B\x03õ\x8f\x91ü'  PRIV(owner='WM/WMCollectionGroupID', data=b'j\x0b@\xb4\x0cX_L\x91~B\x03\xf5\x8f\x91\xfc')
'PRIV:WM/WMCollectionID:j\x0b@´\x0cX_L\x91~B\x03õ\x8f\x91ü'  PRIV(owner='WM/WMCollectionID', data=b'j\x0b@\xb4\x0cX_L\x91~B\x03\xf5\x8f\x91\xfc')
'PRIV:WM/WMContentID:g½6\x97CûÜO\x92BU)pqÔG'        PRIV(owner='WM/WMContentID', data=b'g\xbd6\x97C\xfb\xdcO\x92BU)pq\xd4G')
'TALB' (Album/Movie/Show title)                     "We're Only in It for the Money"
'TBPM' (BPM (beats per minute))                     '122.141'
'TCOM' (Composer)                                   'Frank Zappa'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-experimental or noise'
'TDRC' (Recording time)                             '1968'
'TIT2' (Title/songname/content description)         'The Idiot Bastard Son'
'TKEY' (Initial key)                                '10A'
'TLEN' (Length)                                     '198840'
'TPE1' (Lead performer(s)/Soloist(s))               'Mothers of Invention'
'TPE2' (Band/orchestra/accompaniment)               'The Mothers of Invention'
'TPUB' (Publisher)                                  'Mobile Fidelity Koch'
'TRCK' (Track number/Position in set)               '14'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['experimental rock', 'avant garde', 'progressive rock', 'experimental', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.82 dB'
'TXXX:replaygain_track_peak'                        '0.773926'

========================== row from database ==========================
                                              'id'  1528595
                                            'path'  /data/Music/Bulk/00poprockelectronic/Frank Zappa/We_re Only in It for the Money/14 The Idiot Bastard Son.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  198
                                           'genre'  rock-cppex-experimental or noise
                                        'filesize'  4768212
                                           'mtime'  1636918148
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Frank Zappa We_re 14 rock cppex experimental noise
                                      'tag_artist'  The Mothers of Invention
                                     'tag_release'  We're Only in It for the Money
                                       'tag_title'  The Idiot Bastard Son
                                             'bpm'  122.141
                                    'search_title'  'bastard':3 'idiot':2 'son':4 'the':1
                                   'search_artist'  'invention':4 'mothers':2 'of':3 'the':1
                                  'search_release'  'for':7 'in':5 'it':6 'money':9 'only':4 're':2 'the':8 'we':1 'were':3
                                     'search_rest'  '00poprockelectronic':1 'cppex':7 'experimental':8 'frank':2 'noise':9 're':5 'rock':6 'we':4 'zappa':3
                                    'search_combo'  '00poprockelectronic':18 'bastard':3A 'cppex':24 'experimental':25 'for':15C 'frank':19 'idiot':2A 'in':13C 'invention':8B 'it':14C 'money':17C 'mothers':6B 'noise':26 'of':7B 'only':12C 're':10C,22 'rock':23 'son':4A 'the':1A,5B,16C 'we':9C,21 'were':11C 'zappa':20
                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['experimental rock', 'avant garde', 'progressive rock', 'experimental', 'rock']
                                        'tag_date'  1968
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636918148.2800972  (2021-11-14 20:29:08)
                             'size'  4768212