======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '129'
                                          'artist'  'Otis Williams'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "That's Your Mistake"
                                           'quals'  ("['Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', 'q-chart-1', "
 "'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['soul', 'all', 'spotify', '50s', 'doo wop']"
                                     'discogstags'  "['funk / soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '273'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '109.883'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '109.883'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         "That's Your Mistake"
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Otis Williams'
'TRCK' (Track number/Position in set)               '273'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'funk / soul'
'TXXX:lastfmtags'                                   ['soul', 'all', 'spotify', '50s', 'doo wop']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'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'                        '-0.02 dB'
'TXXX:replaygain_track_peak'                        '0.340460'

========================== row from database ==========================
                                              'id'  1503045
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-273 - Otis Williams - That_s Your Mistake.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  129
                                           'genre'  prerock-unsorted
                                        'filesize'  5165191
                                           'mtime'  1620387589
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 273 That_s prerock unsorted
                                      'tag_artist'  Otis Williams
                                     'tag_release'  None
                                       'tag_title'  That's Your Mistake
                                             'bpm'  109.883
                                    'search_title'  'mistake':5 's':2 'that':1 'thats':3 'your':4
                                   'search_artist'  'otis':1 'williams':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 '273':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':10 's':9 'that':8 'unsorted':11
                                    'search_combo'  '00oldiepop':12 '1956':13 '273':14 'country':11 'exotica':9 'jazz':8 'mistake':5A 'oldies':10 'otis':6B 'prerock':17 's':2A,16 'that':1A,15 'thats':3A 'unsorted':18 'williams':7B 'your':4A
                                    'tag_tracknum'  273
                                      'num_images'  0
                                             'key'  9B
                                           '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-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['soul', 'all', 'spotify', '50s', 'doo wop']
                                        'tag_date'  1956
                                     'discogstags'  ['funk / soul']

============================== file details ==============================
                                           'mtime'  1620387589.3149862  (2021-05-07 13:39:49)
                             'size'  5165191