======================== unified (from filesystem) ========================
                                         'bitrate'  '158.943'
                                        'duration'  '249'
                                          'artist'  'Edvard Grieg'
                                     'text_people'  ''
                                         'release'  'Fantastische Symphonien'
                                           'title'  'Peer Gynt Suite Nr.1 op.46 - 1.Morgenstimmung'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', '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', 'norwegian', 'piano', 'romantic', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '139.2'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'COMM:Comment:XXX'                                  'Gothenburg Symphony Orchestra, Neeme Jarvi'
'MCDI' (Music CD identifier)                        MCDI(data=b'\x00z\x01\x0e\x00\x10\x01\x00\x00\x00\x00!\x00\x10\x02\x00\x00\x001\xcc\x00\x10\x03\x00\x00\x00d\x08\x00\x10\x04\x00\x00\x00\x84\xd8\x00\x10\x05\x00\x00\x00\xcfB\x00\x10\x06\x00\x00\x01\x12\xa4\x00\x10\x07\x00\x00\x01S\xae\x00\x10\x08\x00\x00\x01\x8aw\x00\x10\t\x00\x00\x02Q\xfa\x00\x10\n\x00\x00\x02\x9fR\x00\x10\x0b\x00\x00\x02\xdf{\x00\x10\x0c\x00\x00\x02\xfd\xf3\x00\x10\r\x00\x00\x03J\xb5\x00\x10\x0e\x00\x00\x03\x7f&\x00\x10\xaa\x00\x00\x04\xa4\xff')
'TALB' (Album/Movie/Show title)                     'Fantastische Symphonien'
'TBPM' (BPM (beats per minute))                     '139.2'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TENC' (Encoded by)                                 'Greg'
'TIT2' (Title/songname/content description)         'Peer Gynt Suite Nr.1 op.46 - 1.Morgenstimmung'
'TKEY' (Initial key)                                '12A'
'TPE1' (Lead performer(s)/Soloist(s))               'Edvard Grieg'
'TRCK' (Track number/Position in set)               '4'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.80, LAME dll 3.92, VBR 3, Stereo, High quality'
'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', 'norwegian', 'piano', 'romantic', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'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'                        '+2.89 dB'
'TXXX:replaygain_track_peak'                        '0.840861'

========================== row from database ==========================
                                              'id'  1214010
                                            'path'  /data/Music/Bulk/00instruments-classical/Fantastische Symphonien/Grieg, Edvard - 04 - Peer Gynt Suite Nr.1 op.46 - 1.Morgenstimmung.mp3
                                         'working'  None
                                         'bitrate'  158
                                    'duration_sec'  249
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  4958402
                                           'mtime'  1620561547
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Grieg, 04 prerock classical classical instruments
                                      'tag_artist'  Edvard Grieg
                                     'tag_release'  Fantastische Symphonien
                                       'tag_title'  Peer Gynt Suite Nr.1 op.46 - 1.Morgenstimmung
                                             'bpm'  139.2
                                    'search_title'  '1':5,10 '1morgenstimmung':12 '46':8 'gynt':2 'morgenstimmung':11 'nr':4 'nr1':6 'op':7 'op46':9 'peer':1 'suite':3
                                   'search_artist'  'edvard':1 'grieg':2
                                  'search_release'  'fantastische':1 'symphonien':2
                                     'search_rest'  '00instruments':1 'classical':2 'grieg':3,4 'instruments':6 'prerock':5
                                    'search_combo'  '00instruments':17 '1':5A,10A '1morgenstimmung':12A '46':8A 'classical':18 'edvard':13B 'fantastische':15C 'grieg':14B,19,20 'gynt':2A 'instruments':22 'morgenstimmung':11A 'nr':4A 'nr1':6A 'op':7A 'op46':9A 'peer':1A 'prerock':21 'suite':3A 'symphonien':16C
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  12A
                                           '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-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['composers', 'norwegian', 'piano', 'romantic', 'classical']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561547.1680129  (2021-05-09 13:59:07)
                             'size'  4958402