======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '170'
                                          'artist'  'Duke Ellington'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Diminuendo In Blue'
                                           'quals'  ("['Q-BUSY-3', 'Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'piano', 'blues', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '94.5'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '94.5'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1937-09-20'
'TIT2' (Title/songname/content description)         'Diminuendo In Blue'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '170000'
'TPE1' (Lead performer(s)/Soloist(s))               'Duke Ellington'
'TXXX:Q-BUSY'                                       '3'
'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'                                       '4'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.41 dB'
'TXXX:replaygain_track_peak'                        '0.533231'

========================== row from database ==========================
                                              'id'  1468497
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1937/Duke Ellington - Diminuendo In Blue 20-9-1937.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  170
                                           'genre'  prerock-band
                                        'filesize'  3474119
                                           'mtime'  1643982411
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 20 9 1937 prerock band
                                      'tag_artist'  Duke Ellington
                                     'tag_release'  None
                                       'tag_title'  Diminuendo In Blue
                                             'bpm'  94.5
                                    'search_title'  'blue':3 'diminuendo':1 'in':2
                                   'search_artist'  'duke':1 'ellington':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1937':6 '20':7 '9':8 'band':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':10 '1937':11 '20':12 '9':13 'band':15 'blue':3A 'country':9 'diminuendo':1A 'duke':4B 'ellington':5B 'exotica':7 'in':2A 'jazz':6 'oldies':8 'prerock':14
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-BUSY-3', 'Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-grit-1', 'q-play-3', 'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-1']
                                      'lastfmtags'  ['big band', 'jazz', 'piano', 'blues', 'swing']
                                        'tag_date'  1937
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1643982410.616469  (2022-02-04 14:46:50)
                             'size'  3474119