======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '241'
                                          'artist'  'In Flames'
                                     'text_people'  'Björn Gelotte/Glenn Ljungström/Jesper Strömblad'
                                         'release'  'Jester Race'
                                           'title'  'Lord Hypnos'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['swedish', 'death metal', 'melodic death metal', 'metal', 'swedish metal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'eid-metal-death;eid-metal-melodic'
                                             'bpm'  '123.3'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'MCDI' (Music CD identifier)                        MCDI(data=b'A\x00+\x009\x006\x00+\x005\x008\x00F\x009\x00+\x007\x00E\x00D\x001\x00+\x00B\x008\x000\x008\x00+\x00E\x008\x00E\x001\x00+\x001\x002\x00F\x008\x009\x00+\x001\x008\x007\x00E\x005\x00+\x001\x00D\x00D\x003\x00C\x00+\x002\x002\x006\x00B\x00B\x00+\x002\x007\x009\x001\x003\x00+\x002\x00C\x003\x00D\x007\x00\x00\x00')
'PRIV:AverageLevel:{\x13\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x13\x00\x00')
'PRIV:PeakValue:¡\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xa1\x7f\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 \x002\x004\x006\x009\x009\x008\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x002\x000\x000\x003\x001\x009\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x001\x004\x003\x005\x001\x008\x003\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x002\x004\x006\x009\x009\x008\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x002\x000\x000\x003\x001\x009\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x001\x004\x003\x005\x001\x008\x003\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:òìô\x90\x9aÎ,H\x9dlb\x8ccÇ\x83Ï'  PRIV(owner='WM/WMCollectionGroupID', data=b'\xf2\xec\xf4\x90\x9a\xce,H\x9dlb\x8cc\xc7\x83\xcf')
'PRIV:WM/WMCollectionID:òìô\x90\x9aÎ,H\x9dlb\x8ccÇ\x83Ï'  PRIV(owner='WM/WMCollectionID', data=b'\xf2\xec\xf4\x90\x9a\xce,H\x9dlb\x8cc\xc7\x83\xcf')
'PRIV:WM/WMContentID:\x0cÚ\x87\x10µ0y@\x97Ë\x80!BûÓC'  PRIV(owner='WM/WMContentID', data=b'\x0c\xda\x87\x10\xb50y@\x97\xcb\x80!B\xfb\xd3C')
'TALB' (Album/Movie/Show title)                     'Jester Race'
'TBPM' (BPM (beats per minute))                     '123.3'
'TCOM' (Composer)                                   'Björn Gelotte/Glenn Ljungström/Jesper Strömblad'
'TCON' (Content type, a.k.a. Genre)                 ['eid-metal-death', 'eid-metal-melodic']
'TCOP' (Copyright message)                          '?'
'TDRC' (Recording time)                             '1995'
'TENC' (Encoded by)                                 '?'
'TIT2' (Title/songname/content description)         'Lord Hypnos'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'In Flames'
'TPE2' (Band/orchestra/accompaniment)               'In Flames'
'TPUB' (Publisher)                                  'Nuclear Blast America'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['swedish', 'death metal', 'melodic death metal', 'metal', 'swedish metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.71 dB'
'TXXX:replaygain_track_peak'                        '0.475944'

========================== row from database ==========================
                                              'id'  1401808
                                            'path'  /data/Music/Bulk/00dwimp/00metal/In Flames/Jester Race/In Flames-Jester Race-Lord Hypnos.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  241
                                           'genre'  eid-metal-death;eid-metal-melodic
                                        'filesize'  5792026
                                           'mtime'  1620301988
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal eid metal death;eid metal melodic
                                      'tag_artist'  In Flames
                                     'tag_release'  Jester Race
                                       'tag_title'  Lord Hypnos
                                             'bpm'  123.3
                                    'search_title'  'hypnos':2 'lord':1
                                   'search_artist'  'flames':2 'in':1
                                  'search_release'  'jester':1 'race':2
                                     'search_rest'  '00dwimp':1 '00metal':2 'death':5,7 'eid':3,6,8 'melodic':9 'metal':4
                                    'search_combo'  '00dwimp':7 '00metal':8 'death':11,13 'eid':9,12,14 'flames':4B 'hypnos':2A 'in':3B 'jester':5C 'lord':1A 'melodic':15 'metal':10 'race':6C
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-4', 'q-other-4', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['swedish', 'death metal', 'melodic death metal', 'metal', 'swedish metal']
                                        'tag_date'  1995
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620301987.7308042  (2021-05-06 13:53:07)
                             'size'  5792026