======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '278'
                                          'artist'  'Ella Fitzgerald'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "They Can't Take That Away From Me (+ Louis Armstrong)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '110.603'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '110.603'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         "They Can't Take That Away From Me (+ Louis Armstrong)"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ella Fitzgerald'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.92 dB'
'TXXX:replaygain_track_peak'                        '0.562540'

========================== row from database ==========================
                                              'id'  1504334
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/Ella Fitzgerald - They Can_t Take That Away From Me (+ Louis Armstrong) 16-8-1956.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  278
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  5578406
                                           'mtime'  1620527793
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 Can_t 16 8 1956 prerock jb jazz unsorted
                                      'tag_artist'  Ella Fitzgerald
                                     'tag_release'  None
                                       'tag_title'  They Can't Take That Away From Me (+ Louis Armstrong)
                                             'bpm'  110.603
                                    'search_title'  'armstrong':11,12 'away':7 'can':2 'cant':4 'from':8 'louis':10 'me':9 't':3 'take':5 'that':6 'they':1
                                   'search_artist'  'ella':1 'fitzgerald':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 '8':9 'can':7 'country':4 'exotica':2 'jazz':1 'jb':11 'oldies':3 'prerock':10 't':8 'unsorted':12
                                    'search_combo'  '00oldiepop':19 '1956':20 '8':23 'armstrong':11A,12A 'away':7A 'can':2A,21 'cant':4A 'country':18 'ella':13B 'exotica':16 'fitzgerald':14B 'from':8A 'jazz':15 'jb':25 'louis':10A 'me':9A 'oldies':17 'prerock':24 't':3A,22 'take':5A 'that':6A 'they':1A 'unsorted':26
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527793.375366  (2021-05-09 04:36:33)
                             'size'  5578406