======================== unified (from filesystem) ========================
                                         'bitrate'  '227.373'
                                        'duration'  '236'
                                          'artist'  'Roosevelt Sykes'
                                     'text_people'  ''
                                         'release'  'The Blues'
                                           'title'  'Roosevelt Blues'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-2', 'Q-JZFKS-3', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'piano', 'male vocalists', '20s', 'classic blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '139.658'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Blues'
'TBPM' (BPM (beats per minute))                     '139.658'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Roosevelt Blues'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Roosevelt Sykes'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['blues', 'piano', 'male vocalists', '20s', 'classic blues']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.70 dB'
'TXXX:replaygain_track_peak'                        '1.017008'

========================== row from database ==========================
                                              'id'  1318635
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Blues/04 Roosevelt Blues.wma.mp3
                                         'working'  None
                                         'bitrate'  227
                                    'duration_sec'  236
                                           'genre'  prerock-jb-blues
                                        'filesize'  6715495
                                           'mtime'  1620403794
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 04 Blues.wma prerock jb blues
                                      'tag_artist'  Roosevelt Sykes
                                     'tag_release'  The Blues
                                       'tag_title'  Roosevelt Blues
                                             'bpm'  139.658
                                    'search_title'  'blues':2 'roosevelt':1
                                   'search_artist'  'roosevelt':1 'sykes':2
                                  'search_release'  'blues':2 'the':1
                                     'search_rest'  '00poprockelectronic':1 'blues':2,7 'blueswma':4 'jb':6 'prerock':5 'wma':3
                                    'search_combo'  '00poprockelectronic':7 'blues':2A,6C,8,13 'blueswma':10 'jb':12 'prerock':11 'roosevelt':1A,3B 'sykes':4B 'the':5C 'wma':9
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'piano', 'male vocalists', '20s', 'classic blues']
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620403794.1624167  (2021-05-07 18:09:54)
                             'size'  6715495