======================== unified (from filesystem) ========================
                                         'bitrate'  '160.125'
                                        'duration'  '167'
                                          'artist'  'Wolfgang Amadeus Mozart'
                                     'text_people'  ''
                                         'release'  'Fantastische Symphonien'
                                           'title'  'Symphonie Nr.32 G-dur KV318 - I- Allegro spirotoso'
                                           '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'  "['instrumental', 'composers', 'piano', 'classical', 'classic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1986'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '145.7'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'COMM:Comment:XXX'                                  'Wiener Philharmoniker, James Levine'
'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))                     '145.7'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRL' (Release time)                               '1986'
'TENC' (Encoded by)                                 'Greg'
'TIT2' (Title/songname/content description)         'Symphonie Nr.32 G-dur KV318 - I- Allegro spirotoso'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Wolfgang Amadeus Mozart'
'TRCK' (Track number/Position in set)               '1'
'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'                                   ['instrumental', 'composers', 'piano', 'classical', 'classic']
'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'                        '+1.02 dB'
'TXXX:replaygain_track_peak'                        '0.585737'

========================== row from database ==========================
                                              'id'  1214253
                                            'path'  /data/Music/Bulk/00instruments-classical/Fantastische Symphonien/Mozart W.A. - 01 - Symphonie Nr.32 G-dur KV318 - I- Allegro spirotoso.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  167
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  3357143
                                           'mtime'  1620561553
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical W.A. 01 prerock classical or classical instruments
                                      'tag_artist'  Wolfgang Amadeus Mozart
                                     'tag_release'  Fantastische Symphonien
                                       'tag_title'  Symphonie Nr.32 G-dur KV318 - I- Allegro spirotoso
                                             'bpm'  145.7
                                    'search_title'  '32':3 'allegro':11 'dur':6 'g':5 'gdur':7 'i':9,10 'kv318':8 'nr':2 'nr32':4 'spirotoso':12 'symphonie':1
                                   'search_artist'  'amadeus':2 'mozart':3 'wolfgang':1
                                  'search_release'  'fantastische':1 'symphonien':2
                                     'search_rest'  '00instruments':1 'a':4 'classical':2 'instruments':8 'or':7 'prerock':6 'w':3 'wa':5
                                    'search_combo'  '00instruments':18 '32':3A 'a':21 'allegro':11A 'amadeus':14B 'classical':19 'dur':6A 'fantastische':16C 'g':5A 'gdur':7A 'i':9A,10A 'instruments':25 'kv318':8A 'mozart':15B 'nr':2A 'nr32':4A 'or':24 'prerock':23 'spirotoso':12A 'symphonie':1A 'symphonien':17C 'w':20 'wa':22 'wolfgang':13B
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  10B
                                           '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'  ['instrumental', 'composers', 'piano', 'classical', 'classic']
                                        'tag_date'  1986
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561552.8440952  (2021-05-09 13:59:12)
                             'size'  3357143