======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '339'
                                          'artist'  'Classic Action'
                                     'text_people'  ''
                                         'release'  'Anima Amoris'
                                           'title'  'A Chase'
                                           'quals'  ("['Q-HAP-2', 'Q-SYN-4', 'Q-UNU-1', 'Q-BUSY-3', 'Q-GRIT-2', 'Q-PLAY-3', "
 "'q-bass-1', 'Q-CHART-2', 'Q-JZFKS-1', 'Q-OLDST-3', 'q-drums-4', 'q-other-2', "
 "'q-piano-1', 'q-vocals-2', 'Q-HHRNBTT-1', 'Q-MIXBEAT-4', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['acid', 'techno', 'deutsch']"
                                     'discogstags'  "['techno', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-th-techno'
                                             'bpm'  '128.1'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Anima Amoris'
'TBPM' (BPM (beats per minute))                     '128.1'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno'
'TIT2' (Title/songname/content description)         'A Chase'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Classic Action'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '2'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '4'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-SYN'                                        '4'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['techno', 'electronic']
'TXXX:lastfmtags'                                   ['acid', 'techno', 'deutsch']
'TXXX:q-bass'                                       '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-9.47 dB'
'TXXX:replaygain_track_peak'                        '1.140388'

========================== row from database ==========================
                                              'id'  1478399
                                            'path'  /data/Music/Bulk/00poprockelectronic/Anima Amoris [Techno] 160 MP3/Classic Action - A Chase   Anima.Sknt.Ru.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  339
                                           'genre'  electronic-th-techno
                                        'filesize'  6806381
                                           'mtime'  1620567300
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic [Techno] 160 MP3 Anima.Sknt.Ru electronic th techno
                                      'tag_artist'  Classic Action
                                     'tag_release'  Anima Amoris
                                       'tag_title'  A Chase
                                             'bpm'  128.1
                                    'search_title'  'a':1 'chase':2
                                   'search_artist'  'action':2 'classic':1
                                  'search_release'  'amoris':2 'anima':1
                                     'search_rest'  '00poprockelectronic':1 '160':4 'anima':6 'animaskntru':9 'electronic':10 'mp3':5 'ru':8 'sknt':7 'techno':2,3 'th':11
                                    'search_combo'  '00poprockelectronic':7 '160':10 'a':1A 'action':4B 'amoris':6C 'anima':5C,12 'animaskntru':15 'chase':2A 'classic':3B 'electronic':16 'mp3':11 'ru':14 'sknt':13 'techno':8,9 'th':17
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-4', 'Q-OLDST-3', 'Q-GRIT-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-CHART-2', 'q-drums-4', 'Q-SYN-4', 'q-other-2', 'Q-BUSY-3', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-1']
                                      'lastfmtags'  ['acid', 'techno', 'deutsch']
                                        'tag_date'  
                                     'discogstags'  ['techno', 'electronic']

============================== file details ==============================
                                           'mtime'  1620567300.301048  (2021-05-09 15:35:00)
                             'size'  6806381