======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '171'
                                          'artist'  'Duke Ellington'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I Don't Mind (vocal - Ivie Anderson)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'piano', 'blues', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1942'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '108.066'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '108.066'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1942'
'TIT2' (Title/songname/content description)         "I Don't Mind (vocal - Ivie Anderson)"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Duke Ellington'
'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'                                   ['big band', 'jazz', 'piano', 'blues', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.17 dB'
'TXXX:replaygain_track_peak'                        '0.457329'

========================== row from database ==========================
                                              'id'  1499767
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1942/Duke Ellington - I Don_t Mind (vocal - Ivie Anderson) 26-2-1942.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  171
                                           'genre'  prerock-band
                                        'filesize'  3438386
                                           'mtime'  1620561007
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1942 Don_t 26 2 1942 prerock band
                                      'tag_artist'  Duke Ellington
                                     'tag_release'  None
                                       'tag_title'  I Don't Mind (vocal - Ivie Anderson)
                                             'bpm'  108.066
                                    'search_title'  'anderson':9,10 'don':2 'dont':4 'i':1 'ivie':8 'mind':5 't':3 'vocal':6,7
                                   'search_artist'  'duke':1 'ellington':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1942':6 '2':10 '26':9 'band':12 'country':4 'don':7 'exotica':2 'jazz':1 'oldies':3 'prerock':11 't':8
                                    'search_combo'  '00oldiepop':17 '1942':18 '2':22 '26':21 'anderson':9A,10A 'band':24 'country':16 'don':2A,19 'dont':4A 'duke':11B 'ellington':12B 'exotica':14 'i':1A 'ivie':8A 'jazz':13 'mind':5A 'oldies':15 'prerock':23 't':3A,20 'vocal':6A,7A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', '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-1', 'q-grit-1']
                                      'lastfmtags'  ['big band', 'jazz', 'piano', 'blues', 'swing']
                                        'tag_date'  1942
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561006.8561668  (2021-05-09 13:50:06)
                             'size'  3438386