======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '167'
                                          'artist'  "Mamie Smith's Jazz Hounds"
                                     'text_people'  ''
                                         'release'  'Okeh  4296'
                                           'title'  'Old Time Blues'
                                           'quals'  ("['Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', '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-4', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'jazz', 'female vocalists', 'classic blues', '1920s']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1921'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '89.7'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TALB' (Album/Movie/Show title)                     'Okeh  4296'
'TBPM' (BPM (beats per minute))                     '89.7'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1921-02-21'
'TIT2' (Title/songname/content description)         'Old Time Blues'
'TKEY' (Initial key)                                '4A'
'TLEN' (Length)                                     '167000'
'TPE1' (Lead performer(s)/Soloist(s))               "Mamie Smith's Jazz Hounds"
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'female vocalists', 'classic blues', '1920s']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.75 dB'
'TXXX:replaygain_track_peak'                        '0.499699'

========================== row from database ==========================
                                              'id'  1509874
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1921/Mamie Smith_s Jazz Hounds - Old Time Blues (instrumental) 21-2-1921.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  167
                                           'genre'  prerock-unsorted
                                        'filesize'  3397089
                                           'mtime'  1620385555
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1921 Smith_s (instrumental) 21 1921 prerock unsorted
                                      'tag_artist'  Mamie Smith's Jazz Hounds
                                     'tag_release'  Okeh  4296
                                       'tag_title'  Old Time Blues
                                             'bpm'  89.7
                                    'search_title'  'blues':3 'old':1 'time':2
                                   'search_artist'  'hounds':6 'jazz':5 'mamie':1 's':3 'smith':2 'smiths':4
                                  'search_release'  '4296':2 'okeh':1
                                     'search_rest'  '00oldiepop':5 '1921':6 '21':11 'country':4 'exotica':2 'instrumental':9,10 'jazz':1 'oldies':3 'prerock':12 's':8 'smith':7 'unsorted':13
                                    'search_combo'  '00oldiepop':16 '1921':17 '21':22 '4296':11C 'blues':3A 'country':15 'exotica':13 'hounds':9B 'instrumental':20,21 'jazz':8B,12 'mamie':4B 'okeh':10C 'old':1A 'oldies':14 'prerock':23 's':6B,19 'smith':5B,18 'smiths':7B 'time':2A 'unsorted':24
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-4', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['blues', 'jazz', 'female vocalists', 'classic blues', '1920s']
                                        'tag_date'  1921
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620385555.357108  (2021-05-07 13:05:55)
                             'size'  3397089