======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '130'
                                          'artist'  'Ludwig Van Beethoven'
                                     'text_people'  ''
                                         'release'  'The Famous Piano Sonatas'
                                           'title'  'Beethoven-Moonlight Sonate Op'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-3', 'q-bass-1', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'composers', 'romantic', 'classical', 'classic']"
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1994'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '133.140'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Famous Piano Sonatas'
'TBPM' (BPM (beats per minute))                     '133.140'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1994'
'TIT2' (Title/songname/content description)         'Beethoven-Moonlight Sonate Op'
'TKEY' (Initial key)                                '2B'
'TPE1' (Lead performer(s)/Soloist(s))               'Ludwig Van Beethoven'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['instrumental', 'composers', 'romantic', 'classical', 'classic']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.15 dB'
'TXXX:replaygain_track_peak'                        '0.860245'

========================== row from database ==========================
                                              'id'  194371
                                            'path'  /data/Music/Bulk/00instruments-classical/Beethoven/The Famous Piano Sonatas/02 - Beethoven-Moonlight Sonate Op 27 N 2 in C sharp minor _ Allegretto.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  130
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  3147648
                                           'mtime'  1620574134
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 02 27 N 2 in C sharp minor _ Allegretto prerock classical or classical instruments
                                      'tag_artist'  Ludwig Van Beethoven
                                     'tag_release'  The Famous Piano Sonatas
                                       'tag_title'  Beethoven-Moonlight Sonate Op
                                             'bpm'  133.14
                                    'search_title'  'beethoven':1 'beethovenmoonlight':3 'moonlight':2 'op':5 'sonate':4
                                   'search_artist'  'beethoven':3 'ludwig':1 'van':2
                                  'search_release'  'famous':2 'piano':3 'sonatas':4 'the':1
                                     'search_rest'  '00instruments':1 '2':5 '27':3 'allegretto':10 'c':7 'classical':2 'in':6 'instruments':13 'minor':9 'n':4 'or':12 'prerock':11 'sharp':8
                                    'search_combo'  '00instruments':13 '2':17 '27':15 'allegretto':22 'beethoven':1A,8B 'beethovenmoonlight':3A 'c':19 'classical':14 'famous':10C 'in':18 'instruments':25 'ludwig':6B 'minor':21 'moonlight':2A 'n':16 'op':5A 'or':24 'piano':11C 'prerock':23 'sharp':20 'sonatas':12C 'sonate':4A 'the':9C 'van':7B
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'composers', 'romantic', 'classical', 'classic']
                                        'tag_date'  1994
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1620574134.1054664  (2021-05-09 17:28:54)
                             'size'  3147648