======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '208'
                                          'artist'  'Lycia'
                                     'text_people'  ''
                                         'release'  "Sub Nation Volume One: 'Indus"
                                           'title'  'Sleepless'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['dark ambient', 'ambient', 'gothic', 'ethereal', 'darkwave']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'eid-unsorted'
                                             'bpm'  '106.308'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 0000048A 000003B6 000015E8 00'
'COMM:iTunNORM:eng'                                 (' 0000048A 000003B6 000015E8 00001130 000033F9 0002F601 0000723E 00007338 '
 '0000F000 0000BF79')
'PRIV:AverageLevel:B\x16\x00\x00'                   PRIV(owner='AverageLevel', data=b'B\x16\x00\x00')
'PRIV:PeakValue:7s\x00\x00'                         PRIV(owner='PeakValue', data=b'7s\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)                     "Sub Nation Volume One: 'Indus"
'TBPM' (BPM (beats per minute))                     '106.308'
'TCON' (Content type, a.k.a. Genre)                 'eid-unsorted'
'TIT2' (Title/songname/content description)         'Sleepless'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Lycia'
'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'                                  'rock'
'TXXX:lastfmtags'                                   ['dark ambient', 'ambient', 'gothic', 'ethereal', 'darkwave']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.70 dB'
'TXXX:replaygain_track_peak'                        '0.535236'

========================== row from database ==========================
                                              'id'  1315591
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/sleepless.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  208
                                           'genre'  eid-unsorted
                                        'filesize'  5000964
                                           'mtime'  1636910214
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] sleepless eid unsorted
                                      'tag_artist'  Lycia
                                     'tag_release'  Sub Nation Volume One: 'Indus
                                       'tag_title'  Sleepless
                                             'bpm'  106.308
                                    'search_title'  'sleepless':1
                                   'search_artist'  'lycia':1
                                  'search_release'  'indus':6,7 'nation':2 'one':4,5 'sub':1 'volume':3
                                     'search_rest'  '00poprockelectronic':1 'eid':8 'files':5,6 'loose':3,4 'sleepless':7 'unsorted':2
                                    'search_combo'  '00poprockelectronic':10 'eid':17 'files':14,15 'indus':8C,9C 'loose':12,13 'lycia':2B 'nation':4C 'one':6C,7C 'sleepless':1A,16 'sub':3C 'unsorted':11 'volume':5C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-3', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['dark ambient', 'ambient', 'gothic', 'ethereal', 'darkwave']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1636910213.8432314  (2021-11-14 18:16:53)
                             'size'  5000964