======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '334'
                                          'artist'  'The Prodigy'
                                     'text_people'  ''
                                         'release'  'The Fat of the Land'
                                           'title'  'Breathe'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['industrial', 'dance', 'techno', 'electronic', 'electronica']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-bigbeat'
                                             'bpm'  '130.063'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Fat of the Land'
'TBPM' (BPM (beats per minute))                     '130.063'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-bigbeat'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         'Breathe'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Prodigy'
'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'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['industrial', 'dance', 'techno', 'electronic', 'electronica']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.78 dB'
'TXXX:replaygain_track_peak'                        '0.443061'

========================== row from database ==========================
                                              'id'  1342639
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Prodigy/2. The Prodigy - Breathe.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  334
                                           'genre'  electronic-generic or radio-bigbeat
                                        'filesize'  5348785
                                           'mtime'  1621696628
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 2. electronic generic or radio bigbeat
                                      'tag_artist'  The Prodigy
                                     'tag_release'  The Fat of the Land
                                       'tag_title'  Breathe
                                             'bpm'  130.063
                                    'search_title'  'breathe':1
                                   'search_artist'  'prodigy':2 'the':1
                                  'search_release'  'fat':2 'land':4 'of':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 '2':2,3 'bigbeat':8 'electronic':4 'generic':5 'or':6 'radio':7
                                    'search_combo'  '00poprockelectronic':8 '2':9,10 'bigbeat':15 'breathe':1A 'electronic':11 'fat':5C 'generic':12 'land':7C 'of':6C 'or':13 'prodigy':3B 'radio':14 'the':2B,4C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-4', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['industrial', 'dance', 'techno', 'electronic', 'electronica']
                                        'tag_date'  1997
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621696628.0759754  (2021-05-22 17:17:08)
                             'size'  5348785