======================== unified (from filesystem) ========================
                                         'bitrate'  '209.767'
                                        'duration'  '185'
                                          'artist'  'The Rolling Stones'
                                     'text_people'  ''
                                         'release'  'Exile On Main Street'
                                           'title'  'Happy'
                                           '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-2', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['blues', 'rock', '60s', 'british', 'classic rock']"
                                     'discogstags'  "['rock', 'blues rock', 'country rock', 'rock & roll', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '18'
                                            'date'  '1972'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '131.7'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Exile On Main Street'
'TBPM' (BPM (beats per minute))                     '131.7'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1972'
'TIT2' (Title/songname/content description)         'Happy'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Rolling Stones'
'TRCK' (Track number/Position in set)               '10/18'
'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:discogstags'                                  ['rock', 'blues rock', 'country rock', 'rock & roll', 'classic rock']
'TXXX:lastfmtags'                                   ['blues', 'rock', '60s', 'british', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.32 dB'
'TXXX:replaygain_track_peak'                        '0.521008'

========================== row from database ==========================
                                              'id'  1292169
                                            'path'  /data/Music/Bulk/00poprockelectronic/Rolling Stones/Exile On Main Street/The Rolling Stones - Happy - 10.mp3
                                         'working'  None
                                         'bitrate'  209
                                    'duration_sec'  185
                                           'genre'  rock-cppex-classic
                                        'filesize'  4851942
                                           'mtime'  1636039319
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 10 rock cppex classic
                                      'tag_artist'  The Rolling Stones
                                     'tag_release'  Exile On Main Street
                                       'tag_title'  Happy
                                             'bpm'  131.7
                                    'search_title'  'happy':1
                                   'search_artist'  'rolling':2 'stones':3 'the':1
                                  'search_release'  'exile':1 'main':3 'on':2 'street':4
                                     'search_rest'  '00poprockelectronic':1 'classic':4 'cppex':3 'rock':2
                                    'search_combo'  '00poprockelectronic':9 'classic':12 'cppex':11 'exile':5C 'happy':1A 'main':7C 'on':6C 'rock':10 'rolling':3B 'stones':4B 'street':8C 'the':2B
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'rock', '60s', 'british', 'classic rock']
                                        'tag_date'  1972
                                     'discogstags'  ['rock', 'blues rock', 'country rock', 'rock & roll', 'classic rock']

============================== file details ==============================
                                           'mtime'  1636039319.435328  (2021-11-04 16:21:59)
                             'size'  4851942