======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '141'
                                          'artist'  'Billy Vaughn & His Orchestra'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Little Boy Blue'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'swing', 'oldies', 'myhits', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '411'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '144.438'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.OTHER (Other) b''
                                     
'TBPM' (BPM (beats per minute))                     '144.438'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         'Little Boy Blue'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '141165'
'TPE1' (Lead performer(s)/Soloist(s))               'Billy Vaughn & His Orchestra'
'TRCK' (Track number/Position in set)               '411'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'swing', 'oldies', 'myhits', 'easy listening']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'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'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.98 dB'
'TXXX:replaygain_track_peak'                        '0.496176'

========================== row from database ==========================
                                              'id'  1429257
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-411 - Billy Vaughn & His Orchestra - Little Boy Blue.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  141
                                           'genre'  prerock-swing
                                        'filesize'  5648677
                                           'mtime'  1620562591
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 411 prerock swing
                                      'tag_artist'  Billy Vaughn & His Orchestra
                                     'tag_release'  None
                                       'tag_title'  Little Boy Blue
                                             'bpm'  144.438
                                    'search_title'  'blue':3 'boy':2 'little':1
                                   'search_artist'  'billy':1 'his':3 'orchestra':4 'vaughn':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 '411':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'swing':9
                                    'search_combo'  '00oldiepop':12 '1956':13 '411':14 'billy':4B 'blue':3A 'boy':2A 'country':11 'exotica':9 'his':6B 'jazz':8 'little':1A 'oldies':10 'orchestra':7B 'prerock':15 'swing':16 'vaughn':5B
                                    'tag_tracknum'  411
                                      'num_images'  1
                                             'key'  8A
                                           '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-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'swing', 'oldies', 'myhits', 'easy listening']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562590.537451  (2021-05-09 14:16:30)
                             'size'  5648677