======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '231'
                                          'artist'  'The Simpsons'
                                     'text_people'  ''
                                         'release'  'Simpsons Sing The Blues'
                                           'title'  'Look At All Those Idiots'
                                           'quals'  "['q-bass-3', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-4']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '09'
                                      'tracktotal'  ''
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'Pop'
                                             'bpm'  '115.1'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Simpsons Sing The Blues'
'TBPM' (BPM (beats per minute))                     '115.1'
'TCON' (Content type, a.k.a. Genre)                 'Pop'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Look At All Those Idiots'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Simpsons'
'TPE2' (Band/orchestra/accompaniment)               'The Simpsons'
'TRCK' (Track number/Position in set)               '09'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.80, Fraunhofer acm, 192 kBit/s, 44,100 Hz, Stereo, HQ = off'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.50 dB'
'TXXX:replaygain_track_peak'                        '0.412236'

========================== row from database ==========================
                                              'id'  1538575
                                            'path'  /data/Music/Other/PrevSet/[9amusing]/MBZ;#The Simpsons;#Simpsons Sing The Blues;#09;#Look At All Those Idiots.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  231
                                           'genre'  Pop
                                        'filesize'  5561116
                                           'mtime'  1662800561
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing] MBZ;#The Simpsons;#Simpsons Blues;#09;#Look Pop
                                      'tag_artist'  The Simpsons
                                     'tag_release'  Simpsons Sing The Blues
                                       'tag_title'  Look At All Those Idiots
                                             'bpm'  115.1
                                    'search_title'  'all':3 'at':2 'idiots':5 'look':1 'those':4
                                   'search_artist'  'simpsons':2 'the':1
                                  'search_release'  'blues':4 'simpsons':1 'sing':2 'the':3
                                     'search_rest'  '09':13,16 '9amusing':2,3 'blues':12,15 'look':14,17 'mbz':4,6 'pop':18 'prev':19 'prevset':1 'set':20 'simpsons':8,9,10,11 'the':5,7
                                    'search_combo'  '09':24,27 '9amusing':13,14 'all':3A 'at':2A 'blues':11C,23,26 'idiots':5A 'look':1A,25,28 'mbz':15,17 'pop':29 'prev':30 'prevset':12 'set':31 'simpsons':7B,8C,19,20,21,22 'sing':9C 'the':6B,10C,16,18 'those':4A
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['q-bass-3', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-4']
                                      'lastfmtags'  []
                                        'tag_date'  1990
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800561.1444995  (2022-09-10 11:02:41)
                             'size'  5561116