======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '493'
                                          'artist'  'Desiderii Marginis'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Beyond Retrieval'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  ("['industrial', 'ambient', '77davez all tracks', 'dark ambient', 'cold meat "
 "industry', 'martial industrial']")
                                     'discogstags'  "['dark ambient', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-drone'
                                             'bpm'  '125.1'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '125.1'
'TCON' (Content type, a.k.a. Genre)                 'electronic-drone'
'TIT2' (Title/songname/content description)         'Beyond Retrieval'
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Desiderii Marginis'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['dark ambient', 'electronic']
'TXXX:lastfmtags'                                   ['industrial',
 'ambient',
 '77davez all tracks',
 'dark ambient',
 'cold meat industry',
 'martial industrial']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-3.16 dB'
'TXXX:replaygain_track_peak'                        '0.519573'

========================== row from database ==========================
                                              'id'  1425608
                                            'path'  /data/Music/Bulk/00poprockelectronic/00drone/Desiderii Marginis - Beyond Retrieval.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  493
                                           'genre'  electronic-drone
                                        'filesize'  9873492
                                           'mtime'  1636912630
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 00drone electronic drone
                                      'tag_artist'  Desiderii Marginis
                                     'tag_release'  None
                                       'tag_title'  Beyond Retrieval
                                             'bpm'  125.1
                                    'search_title'  'beyond':1 'retrieval':2
                                   'search_artist'  'desiderii':1 'marginis':2
                                  'search_release'  
                                     'search_rest'  '00drone':2 '00poprockelectronic':1 'drone':4 'electronic':3
                                    'search_combo'  '00drone':6 '00poprockelectronic':5 'beyond':1A 'desiderii':3B 'drone':8 'electronic':7 'marginis':4B 'retrieval':2A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-3', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['industrial', 'ambient', '77davez all tracks', 'dark ambient', 'cold meat industry', 'martial industrial']
                                        'tag_date'  
                                     'discogstags'  ['dark ambient', 'electronic']

============================== file details ==============================
                                           'mtime'  1636912630.1400661  (2021-11-14 18:57:10)
                             'size'  9873492