======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '230'
                                          'artist'  'Oleg Kostrow'
                                     'text_people'  ''
                                         'release'  'Shirley & Spinoza'
                                           'title'  'Unter Wasser'
                                           'quals'  ("['Q-OLDST-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-1', "
 "'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['russian', 'new weird russia', 'electronic', 'experimental', 'surf']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  '15'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '140.141'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 000006B0 0000067C 0000A10D 00013251 00015292 00015278 0000872C 00008484 '
 '0001B65E 0000B158')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000768 00000000009AF308 00000000 00705C16 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '15+310A8183F04E45E54D2EFA5A5C12FFEC+955622'
'TALB' (Album/Movie/Show title)                     'Shirley & Spinoza'
'TBPM' (BPM (beats per minute))                     '140.141'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-shirleyspinoza', 'set-pl-shirleyspinoza', 'set-pl-mor']
'TENC' (Encoded by)                                 'iTunes v7.3.2'
'TIT2' (Title/songname/content description)         'Unter Wasser'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Oleg Kostrow'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '14/15'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['russian', 'new weird russia', 'electronic', 'experimental', 'surf']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'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'                        '-1.02 dB'
'TXXX:replaygain_track_peak'                        '0.523818'

========================== row from database ==========================
                                              'id'  949170
                                            'path'  /data/Music/Bulk/sns/Oleg Kostrow - Unter Wasser.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  230
                                           'genre'  set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  7372524
                                           'mtime'  1621044087
                                   'redo_metaread'  0
                                        'rest_str'   sns set pl shirleyspinoza;set pl mor
                                      'tag_artist'  Oleg Kostrow
                                     'tag_release'  Shirley & Spinoza
                                       'tag_title'  Unter Wasser
                                             'bpm'  140.141
                                    'search_title'  'unter':1 'wasser':2
                                   'search_artist'  'kostrow':2 'oleg':1
                                  'search_release'  'shirley':1 'spinoza':2
                                     'search_rest'  'mor':8 'pl':3 'set':2,5,7 'shirleyspinoza':4,6 'sns':1
                                    'search_combo'  'kostrow':4B 'mor':14 'oleg':3B 'pl':9 'set':8,11,13 'shirley':5C 'shirleyspinoza':10,12 'sns':7 'spinoza':6C 'unter':1A 'wasser':2A
                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  3A
                                           '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-2', 'q-syn-2', 'q-chart-1', 'q-other-4', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['russian', 'new weird russia', 'electronic', 'experimental', 'surf']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621044086.9651334  (2021-05-15 04:01:26)
                             'size'  7372524