======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '165'
                                          'artist'  'Johnny Cash'
                                     'text_people'  'June Carter Cash/Merle Kilgore'
                                         'release'  'Hits'
                                           'title'  ''
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '110.664'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 00000244 00000248 000010DD 00'
'COMM:iTunNORM:eng'                                 (' 00000244 00000248 000010DD 00000F64 0001276B 0001276B 00005A5B 00005265 '
 '00011945 00011945')
'POPM:Windows Media Player 9 Series'                POPM(email='Windows Media Player 9 Series', rating=196, count=0)
'PRIV:AverageLevel:k\n\x00\x00'                     PRIV(owner='AverageLevel', data=b'k\n\x00\x00')
'PRIV:PeakValue:[Z\x00\x00'                         PRIV(owner='PeakValue', data=b'[Z\x00\x00')
'PRIV:WM/UniqueFileIdentifier:A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x002\x007\x006\x002\x005\x008\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x001\x005\x004\x008\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x002\x005\x008\x007\x005\x001\x000\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x002\x007\x006\x002\x005\x008\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x001\x005\x004\x008\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x002\x005\x008\x007\x005\x001\x000\x00\x00\x00')
'PRIV:ZuneAlbumArtistMediaID:\x8c\x08Wc\x8cwÜ\x11\x94\x03\x00\x19¹²\x08h'  PRIV(owner='ZuneAlbumArtistMediaID', data=b'\x8c\x08Wc\x8cw\xdc\x11\x94\x03\x00\x19\xb9\xb2\x08h')
'PRIV:ZuneAlbumMediaID:\x00£%\x81\x00\x01Û\x11\x89Ê\x00\x19¹*93'  PRIV(owner='ZuneAlbumMediaID', data=b'\x00\xa3%\x81\x00\x01\xdb\x11\x89\xca\x00\x19\xb9*93')
'PRIV:ZuneCollectionID:WïÐqíð`F\x95ët\x06E´lN'      PRIV(owner='ZuneCollectionID', data=b'W\xef\xd0q\xed\xf0`F\x95\xebt\x06E\xb4lN')
'PRIV:ZuneMediaID:\x00£%\x89\x00\x01Û\x11\x89Ê\x00\x19¹*93'  PRIV(owner='ZuneMediaID', data=b'\x00\xa3%\x89\x00\x01\xdb\x11\x89\xca\x00\x19\xb9*93')
'TALB' (Album/Movie/Show title)                     'Hits'
'TBPM' (BPM (beats per minute))                     '110.664'
'TCOM' (Composer)                                   'June Carter Cash/Merle Kilgore'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '1997'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TPE2' (Band/orchestra/accompaniment)               'Johnny Cash'
'TPOS' (Part of a set)                              '1/1'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'folk, world, & country'
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.74 dB'
'TXXX:replaygain_track_peak'                        '0.705929'

========================== row from database ==========================
                                              'id'  1289574
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/johny cash - ring of fire.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  165
                                           'genre'  ifs-songwriter
                                        'filesize'  2647182
                                           'mtime'  1637330775
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] johny cash ring of fire ifs songwriter
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  Hits
                                       'tag_title'  None
                                             'bpm'  110.664
                                    'search_title'  None
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'hits':1
                                     'search_rest'  '00poprockelectronic':1 'cash':8 'files':5,6 'fire':11 'ifs':12 'johny':7 'loose':3,4 'of':10 'ring':9 'songwriter':13 'unsorted':2
                                    'search_combo'  '00poprockelectronic':4 'cash':2B,11 'files':8,9 'fire':14 'hits':3C 'ifs':15 'johnny':1B 'johny':10 'loose':6,7 'of':13 'ring':12 'songwriter':16 'unsorted':5
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-piano-1', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  1997
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1637330775.4624956  (2021-11-19 15:06:15)
                             'size'  2647182