======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '167'
                                          'artist'  'Original Dixieland Jazz Band'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Crazy Blues'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['new orleans', 'american', 'jazz', 'dixieland', 'dixieland jazz']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1921'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '127.4'
                                             'key'  '6B'
                                        '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))                     '127.4'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1921-01-28'
'TIT2' (Title/songname/content description)         'Crazy Blues'
'TKEY' (Initial key)                                '6B'
'TLEN' (Length)                                     '167000'
'TPE1' (Lead performer(s)/Soloist(s))               'Original Dixieland Jazz Band'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['new orleans', 'american', 'jazz', 'dixieland', 'dixieland jazz']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'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'                        '+0.54 dB'
'TXXX:replaygain_track_peak'                        '0.591463'

========================== row from database ==========================
                                              'id'  1466795
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1921/Original Dixieland Jazz Band - Crazy Blues 28-1-1921.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  167
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  3416127
                                           'mtime'  1620524914
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1921 28 1 1921 prerock jb jazz unsorted
                                      'tag_artist'  Original Dixieland Jazz Band
                                     'tag_release'  None
                                       'tag_title'  Crazy Blues
                                             'bpm'  127.4
                                    'search_title'  'blues':2 'crazy':1
                                   'search_artist'  'band':4 'dixieland':2 'jazz':3 'original':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1':8 '1921':6 '28':7 'country':4 'exotica':2 'jazz':1 'jb':10 'oldies':3 'prerock':9 'unsorted':11
                                    'search_combo'  '00oldiepop':11 '1':14 '1921':12 '28':13 'band':6B 'blues':2A 'country':10 'crazy':1A 'dixieland':4B 'exotica':8 'jazz':5B,7 'jb':16 'oldies':9 'original':3B 'prerock':15 'unsorted':17
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['new orleans', 'american', 'jazz', 'dixieland', 'dixieland jazz']
                                        'tag_date'  1921
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620524914.0263333  (2021-05-09 03:48:34)
                             'size'  3416127