======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '140'
                                          'artist'  'Dr Who'
                                     'text_people'  'Ron Granier/Delia Derbyshire'
                                         'release'  ''
                                           'title'  'Dr. N.E.S.'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-2', 'q-syn-3', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['doctor who', 'soundtrack', 'awesome', 'british', 'audiobook']"
                                     'discogstags'  "['house', 'electronic', 'euro house']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'soundtrack-video-series'
                                             'bpm'  '139.658'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 00000204 00000204 00000A46 00000A46 0000A1D6 0000A1D6 00005B42 00005B42 '
 '0000CD4E 0000CD4E')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000B67 00000000005E5C09 00000000 00334DE1 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TBPM' (BPM (beats per minute))                     '139.658'
'TCOM' (Composer)                                   'Ron Granier/Delia Derbyshire'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-video-series'
'TDRC' (Recording time)                             '2008'
'TENC' (Encoded by)                                 'iTunes v7.6.2'
'TIT2' (Title/songname/content description)         'Dr. N.E.S.'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'E E Berzins'
'TPE2' (Band/orchestra/accompaniment)               'Dr Who'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['house', 'electronic', 'euro house']
'TXXX:lastfmtags'                                   ['doctor who', 'soundtrack', 'awesome', 'british', 'audiobook']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-2.45 dB'
'TXXX:replaygain_track_peak'                        '0.707574'

========================== row from database ==========================
                                              'id'  979923
                                            'path'  /data/Music/Bulk/0soundtrack/Dr Who - Collection/Dr Who - Dr.N.E.S - By E E Berzins.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  140
                                           'genre'  soundtrack-video-series
                                        'filesize'  3543887
                                           'mtime'  1636921514
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Collection Dr.N.E.S By Berzins soundtrack video series
                                      'tag_artist'  Dr Who
                                     'tag_release'  None
                                       'tag_title'  Dr. N.E.S.
                                             'bpm'  139.658
                                    'search_title'  'dr':1,2 'e':4 'n':3 'nes':6 's':5
                                   'search_artist'  'dr':1 'who':2
                                  'search_release'  
                                     'search_rest'  '0soundtrack':1 'berzins':9 'by':8 'collection':2 'dr':3 'drnes':7 'e':5 'n':4 's':6 'series':12 'soundtrack':10 'video':11
                                    'search_combo'  '0soundtrack':9 'berzins':17 'by':16 'collection':10 'dr':1A,2A,7B,11 'drnes':15 'e':4A,13 'n':3A,12 'nes':6A 's':5A,14 'series':20 'soundtrack':18 'video':19 'who':8B
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-3', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['doctor who', 'soundtrack', 'awesome', 'british', 'audiobook']
                                        'tag_date'  2008
                                     'discogstags'  ['house', 'electronic', 'euro house']

============================== file details ==============================
                                           'mtime'  1636921514.3421555  (2021-11-14 21:25:14)
                             'size'  3543887