======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '156'
                                          'artist'  'Les Paul & Mary Ford'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'St Louis Blues'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['guitar', 'jazz', '50s', 'pop', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1953'
                                        'comments'  ''
                                           'genre'  'prerock-guitar'
                                             'bpm'  '88.515'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '88.515'
'TCON' (Content type, a.k.a. Genre)                 'prerock-guitar'
'TDRC' (Recording time)                             '1953'
'TIT2' (Title/songname/content description)         'St Louis Blues'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Les Paul & Mary Ford'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['guitar', 'jazz', '50s', 'pop', 'oldies']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.20 dB'
'TXXX:replaygain_track_peak'                        '0.468784'

========================== row from database ==========================
                                              'id'  1440695
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1953/Les Paul & Mary Ford - St Louis Blues 1953.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  156
                                           'genre'  prerock-guitar
                                        'filesize'  3135283
                                           'mtime'  1621705371
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1953 1953 prerock guitar
                                      'tag_artist'  Les Paul & Mary Ford
                                     'tag_release'  None
                                       'tag_title'  St Louis Blues
                                             'bpm'  88.515
                                    'search_title'  'blues':3 'louis':2 'st':1
                                   'search_artist'  'ford':4 'les':1 'mary':3 'paul':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1953':6 'country':4 'exotica':2 'guitar':8 'jazz':1 'oldies':3 'prerock':7
                                    'search_combo'  '00oldiepop':12 '1953':13 'blues':3A 'country':11 'exotica':9 'ford':7B 'guitar':15 'jazz':8 'les':4B 'louis':2A 'mary':6B 'oldies':10 'paul':5B 'prerock':14 'st':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['guitar', 'jazz', '50s', 'pop', 'oldies']
                                        'tag_date'  1953
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621705371.1512146  (2021-05-22 19:42:51)
                             'size'  3135283