======================== unified (from filesystem) ========================
                                         'bitrate'  '127.794'
                                        'duration'  '169'
                                          'artist'  'Billy Holiday'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Let's dream in the moonlight"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'blues', 'female vocalists', 'vocal jazz', 'billie holiday']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  '21'
                                            'date'  '1940'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-vocal'
                                             'bpm'  '113.453'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '113.453'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-vocal'
'TDRC' (Recording time)                             '1940'
'TIT2' (Title/songname/content description)         "Let's dream in the moonlight"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Billy Holiday'
'TRCK' (Track number/Position in set)               '18/21'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'blues', 'female vocalists', 'vocal jazz', 'billie holiday']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.41 dB'
'TXXX:replaygain_track_peak'                        '0.476363'

========================== row from database ==========================
                                              'id'  1515165
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Holiday, Billy/Collectors/Billy Holiday - Let_s Dream In the Moonlight - 18.mp3
                                         'working'  None
                                         'bitrate'  127
                                    'duration_sec'  169
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  2713600
                                           'mtime'  1620530033
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Holiday, Collectors Let_s Dream In Moonlight 18 prerock jb jazz vocal
                                      'tag_artist'  Billy Holiday
                                     'tag_release'  None
                                       'tag_title'  Let's dream in the moonlight
                                             'bpm'  113.453
                                    'search_title'  'dream':4 'in':5 'let':1 'lets':3 'moonlight':7 's':2 'the':6
                                   'search_artist'  'billy':1 'holiday':2
                                  'search_release'  
                                     'search_rest'  '18':13 'collectors':7 'country':4 'dream':10 'exotica':2 'holiday':5,6 'in':11 'jazz':1 'jb':15 'let':8 'moonlight':12 'oldies':3 'prerock':14 's':9 'vocal':16
                                    'search_combo'  '18':22 'billy':8B 'collectors':16 'country':13 'dream':4A,19 'exotica':11 'holiday':9B,14,15 'in':5A,20 'jazz':10 'jb':24 'let':1A,17 'lets':3A 'moonlight':7A,21 'oldies':12 'prerock':23 's':2A,18 'the':6A 'vocal':25
                                    'tag_tracknum'  18
                                      'num_images'  0
                                             'key'  4A
                                           '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-1', 'q-syn-1', 'q-chart-4', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['jazz', 'blues', 'female vocalists', 'vocal jazz', 'billie holiday']
                                        'tag_date'  1940
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620530032.5888422  (2021-05-09 05:13:52)
                             'size'  2713600