======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '147'
                                          'artist'  'The Beatles'
                                     'text_people'  ''
                                         'release'  'please please me'
                                           'title'  'ask me why'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['pop', 'rock', '60s', 'british', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '06'
                                      'tracktotal'  ''
                                            'date'  '1963'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '135.455'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'please please me'
'TBPM' (BPM (beats per minute))                     '135.455'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1963'
'TIT2' (Title/songname/content description)         'ask me why'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Beatles'
'TRCK' (Track number/Position in set)               '06'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['pop', 'rock', '60s', 'british', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.40 dB'
'TXXX:replaygain_track_peak'                        '0.442449'

========================== row from database ==========================
                                              'id'  1527194
                                            'path'  /data/Music/Bulk/00poprockelectronic/Beatles/_63-please please me/The Beatles - Ask Me Why.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  147
                                           'genre'  rock-cppex-classic
                                        'filesize'  2366047
                                           'mtime'  1636039028
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic _63 Ask Me Why rock cppex classic
                                      'tag_artist'  The Beatles
                                     'tag_release'  please please me
                                       'tag_title'  ask me why
                                             'bpm'  135.455
                                    'search_title'  'ask':1 'me':2 'why':3
                                   'search_artist'  'beatles':2 'the':1
                                  'search_release'  'me':2 'please':1
                                     'search_rest'  '00poprockelectronic':1 '63':2 'ask':3 'classic':8 'cppex':7 'me':4 'rock':6 'why':5
                                    'search_combo'  '00poprockelectronic':8 '63':9 'ask':1A,10 'beatles':5B 'classic':15 'cppex':14 'me':2A,7C,11 'please':6C 'rock':13 'the':4B 'why':3A,12
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['pop', 'rock', '60s', 'british', 'classic rock']
                                        'tag_date'  1963
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636039028.010792  (2021-11-04 16:17:08)
                             'size'  2366047