======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '664'
                                          'artist'  'Johann Strauss II'
                                     'text_people'  ''
                                         'release'  'Fallout 4 OST (Classic radio station)'
                                           'title'  'Blue Danube Waltz'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['composers', 'instrumental', 'waltz', 'romantic', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '21'
                                      'tracktotal'  '29'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'soundtrack-game'
                                             'bpm'  '110.664'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Fallout 4 OST (Classic radio station)'
'TBPM' (BPM (beats per minute))                     '110.664'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-game'
'TIT2' (Title/songname/content description)         'Blue Danube Waltz'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Johann Strauss II'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '21/29'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf53.30.100'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['composers', 'instrumental', 'waltz', 'romantic', 'classical']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.72 dB'
'TXXX:replaygain_track_peak'                        '0.605137'

========================== row from database ==========================
                                              'id'  739593
                                            'path'  /data/Music/Bulk/0soundtrack/Fallout 4 - Classical Radio/21. Johann Strauss II - Blue Danube Waltz.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  664
                                           'genre'  soundtrack-game
                                        'filesize'  10631688
                                           'mtime'  1623433159
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Classical Radio 21. soundtrack game
                                      'tag_artist'  Johann Strauss II
                                     'tag_release'  Fallout 4 OST (Classic radio station)
                                       'tag_title'  Blue Danube Waltz
                                             'bpm'  110.664
                                    'search_title'  'blue':1 'danube':2 'waltz':3
                                   'search_artist'  'ii':3 'johann':1 'strauss':2
                                  'search_release'  '4':2 'classic':4,5 'fallout':1 'ost':3 'radio':6 'station':7,8
                                     'search_rest'  '0soundtrack':1 '21':4,5 'classical':2 'game':7 'radio':3 'soundtrack':6
                                    'search_combo'  '0soundtrack':15 '21':18,19 '4':8C 'blue':1A 'classic':10C,11C 'classical':16 'danube':2A 'fallout':7C 'game':21 'ii':6B 'johann':4B 'ost':9C 'radio':12C,17 'soundtrack':20 'station':13C,14C 'strauss':5B 'waltz':3A
                                    'tag_tracknum'  21
                                      '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-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['composers', 'instrumental', 'waltz', 'romantic', 'classical']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1623433158.9110496  (2021-06-11 19:39:18)
                             'size'  10631688