======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '184'
                                          'artist'  'Champion Jack Dupree'
                                     'text_people'  ''
                                         'release'  'Women Blues'
                                           'title'  'Rattlesnake Boogie'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-3', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-2', 'q-drums-2', 'q-other-3', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['boogie woogie', 'new orleans', 'blues', 'piano blues', 'piano']"
                                     'discogstags'  "['blues', 'piano blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '1961'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '125.939'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Women Blues'
'TBPM' (BPM (beats per minute))                     '125.939'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1961'
'TENC' (Encoded by)                                 'Acoustica'
'TIT2' (Title/songname/content description)         'Rattlesnake Boogie'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Champion Jack Dupree'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['blues', 'piano blues']
'TXXX:lastfmtags'                                   ['boogie woogie', 'new orleans', 'blues', 'piano blues', 'piano']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.07 dB'
'TXXX:replaygain_track_peak'                        '0.566705'

========================== row from database ==========================
                                              'id'  973751
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Women blues (1961)/07 rattlesnake boogie.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  184
                                           'genre'  prerock-jb-blues
                                        'filesize'  8127038
                                           'mtime'  1620574020
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country blues (1961) 07 rattlesnake boogie prerock jb blues
                                      'tag_artist'  Champion Jack Dupree
                                     'tag_release'  Women Blues
                                       'tag_title'  Rattlesnake Boogie
                                             'bpm'  125.939
                                    'search_title'  'boogie':2 'rattlesnake':1
                                   'search_artist'  'champion':1 'dupree':3 'jack':2
                                  'search_release'  'blues':2 'women':1
                                     'search_rest'  '1961':6,7 'blues':5 'boogie':9 'country':4 'exotica':2 'jazz':1 'jb':11 'oldies':3 'prerock':10 'rattlesnake':8
                                    'search_combo'  '1961':13,14 'blues':7C,12 'boogie':2A,16 'champion':3B 'country':11 'dupree':5B 'exotica':9 'jack':4B 'jazz':8 'jb':18 'oldies':10 'prerock':17 'rattlesnake':1A,15 'women':6C
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['boogie woogie', 'new orleans', 'blues', 'piano blues', 'piano']
                                        'tag_date'  1961
                                     'discogstags'  ['blues', 'piano blues']

============================== file details ==============================
                                           'mtime'  1620574020.111384  (2021-05-09 17:27:00)
                             'size'  8127038