======================== unified (from filesystem) ========================
                                         'bitrate'  '127.986'
                                        'duration'  '246'
                                          'artist'  'Johann Sebastian Bach'
                                     'text_people'  ''
                                         'release'  'Bach [Everyman]'
                                           'title'  'Violin Concerto No. 1 In A Minor BWV 1041 (Allegro)'
                                           'quals'  ("['Q-HAP-2', 'Q-OLDST-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'composers', 'baroque', 'german', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '121.337'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Bach [Everyman]'
'TBPM' (BPM (beats per minute))                     '121.337'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Violin Concerto No. 1 In A Minor BWV 1041 (Allegro)'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Johann Sebastian Bach'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'composers', 'baroque', 'german', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+3.69 dB'
'TXXX:replaygain_track_peak'                        '0.563308'

========================== row from database ==========================
                                              'id'  1353593
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Grandaddy-Concrete Dunes-14-Tester.mp3
                                         'working'  None
                                         'bitrate'  127
                                    'duration_sec'  246
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  3942230
                                           'mtime'  1637329820
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] Grandaddy Concrete Dunes 14 Tester prerock classical classical instruments
                                      'tag_artist'  Johann Sebastian Bach
                                     'tag_release'  Bach [Everyman]
                                       'tag_title'  Violin Concerto No. 1 In A Minor BWV 1041 (Allegro)
                                             'bpm'  121.337
                                    'search_title'  '1':5 '1041':10 'a':7 'allegro':11,12 'bwv':9 'concerto':2 'in':6 'minor':8 'no':3,4 'violin':1
                                   'search_artist'  'bach':3 'johann':1 'sebastian':2
                                  'search_release'  'bach':1 'everyman':2,3
                                     'search_rest'  '00poprockelectronic':1 'classical':12 'concrete':8 'dunes':9 'files':5,6 'grandaddy':7 'instruments':13 'loose':3,4 'prerock':11 'tester':10 'unsorted':2
                                    'search_combo'  '00poprockelectronic':19 '1':5A '1041':10A 'a':7A 'allegro':11A,12A 'bach':15B,16C 'bwv':9A 'classical':30 'concerto':2A 'concrete':26 'dunes':27 'everyman':17C,18C 'files':23,24 'grandaddy':25 'in':6A 'instruments':31 'johann':13B 'loose':21,22 'minor':8A 'no':3A,4A 'prerock':29 'sebastian':14B 'tester':28 'unsorted':20 'violin':1A
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'composers', 'baroque', 'german', 'classical']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329819.7776537  (2021-11-19 14:50:19)
                             'size'  3942230