======================== unified (from filesystem) ========================
                                         'bitrate'  '128.218'
                                        'duration'  '302'
                                          'artist'  'DJ Shadow'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Midnight in a perfect world'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', "
 "'Q-HHRNBTT-2', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['electronica', 'electronic', 'trip hop', 'hip hop', 'turntablism']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'hip hop or rnb or rap or turntablism'
                                             'bpm'  '105.863'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '105.863'
'TCON' (Content type, a.k.a. Genre)                 'hip hop or rnb or rap or turntablism'
'TIT2' (Title/songname/content description)         'Midnight in a perfect world'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'DJ Shadow'
'TXXX:Mp3gain_minmax'                               '138,189'
'TXXX:Mp3gain_undo'                                 '+004,+004,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['electronica', 'electronic', 'trip hop', 'hip hop', 'turntablism']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.06 dB'
'TXXX:replaygain_track_peak'                        '0.466988'

========================== row from database ==========================
                                              'id'  1325713
                                            'path'  /data/Music/Bulk/00poprockelectronic/DJ Shadow/dj shadow - midnight in a perfect world.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  302
                                           'genre'  hip hop or rnb or rap or turntablism
                                        'filesize'  4858300
                                           'mtime'  1620568770
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic dj shadow midnight hip hop rnb rap turntablism
                                      'tag_artist'  DJ Shadow
                                     'tag_release'  None
                                       'tag_title'  Midnight in a perfect world
                                             'bpm'  105.863
                                    'search_title'  'a':3 'in':2 'midnight':1 'perfect':4 'world':5
                                   'search_artist'  'dj':1 'shadow':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'dj':2 'hip':5 'hop':6 'midnight':4 'rap':8 'rnb':7 'shadow':3 'turntablism':9
                                    'search_combo'  '00poprockelectronic':8 'a':3A 'dj':6B,9 'hip':12 'hop':13 'in':2A 'midnight':1A,11 'perfect':4A 'rap':15 'rnb':14 'shadow':7B,10 'turntablism':16 'world':5A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-2', '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-3', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'electronic', 'trip hop', 'hip hop', 'turntablism']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620568770.3342583  (2021-05-09 15:59:30)
                             'size'  4858300