======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '101'
                                          'artist'  'Oidupaa Vladimir Oiun'
                                     'text_people'  ''
                                         'release'  'Divine Music From a Jail'
                                           'title'  'My Nightingale'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', 'Q-UNU-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['tuvan', 'tuva', 'throat singing', 'folk', 'accordion']"
                                     'discogstags'  "['folk, world, & country', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'loc-russia-tuva'
                                             'bpm'  '141.216'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 0000035F 00000402 0000552C'
'COMM:iTunNORM:eng'                                 (' 0000035F 00000402 0000552C 00004559 0000F145 0000F145 00007EE6 00007F3E '
 '000182C1 000182C1')
'TALB' (Album/Movie/Show title)                     'Divine Music From a Jail'
'TBPM' (BPM (beats per minute))                     '141.216'
'TCON' (Content type, a.k.a. Genre)                 'loc-russia-tuva'
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         'My Nightingale'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Oidupaa Vladimir Oiun'
'TPE2' (Band/orchestra/accompaniment)               'Oidupaa Vladimir Oiun'
'TRCK' (Track number/Position in set)               '15'
'TSSE' (Software/Hardware and settings used for encoding)  'Lame3.97'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '3'
'TXXX:discogstags'                                  ['folk, world, & country', 'folk']
'TXXX:lastfmtags'                                   ['tuvan', 'tuva', 'throat singing', 'folk', 'accordion']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.78 dB'
'TXXX:replaygain_track_peak'                        '0.702931'

========================== row from database ==========================
                                              'id'  980885
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Divine Music From a Jail/15 My Nightingale.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  101
                                           'genre'  loc-russia-tuva
                                        'filesize'  4097547
                                           'mtime'  1621627937
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 15 loc russia tuva
                                      'tag_artist'  Oidupaa Vladimir Oiun
                                     'tag_release'  Divine Music From a Jail
                                       'tag_title'  My Nightingale
                                             'bpm'  141.216
                                    'search_title'  'my':1 'nightingale':2
                                   'search_artist'  'oidupaa':1 'oiun':3 'vladimir':2
                                  'search_release'  'a':4 'divine':1 'from':3 'jail':5 'music':2
                                     'search_rest'  'country':4 'exotica':2 'jazz':1 'loc':5 'oldies':3 'russia':6 'tuva':7
                                    'search_combo'  'a':9C 'country':14 'divine':6C 'exotica':12 'from':8C 'jail':10C 'jazz':11 'loc':15 'music':7C 'my':1A 'nightingale':2A 'oidupaa':3B 'oiun':5B 'oldies':13 'russia':16 'tuva':17 'vladimir':4B
                                    'tag_tracknum'  15
                                      'num_images'  1
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['tuvan', 'tuva', 'throat singing', 'folk', 'accordion']
                                        'tag_date'  2003
                                     'discogstags'  ['folk, world, & country', 'folk']

============================== file details ==============================
                                           'mtime'  1621627937.2309148  (2021-05-21 22:12:17)
                             'size'  4097547