======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '196'
                                          'artist'  'Victoria Spivey'
                                     'text_people'  ''
                                         'release'  'Sissy Man Blues (1927-1936)'
                                           'title'  'Black Snake Blues'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-2', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['1920s', 'blues', 'jazz', 'female vocalists', '20s']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '1930'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '145.895'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Sissy Man Blues (1927-1936)'
'TBPM' (BPM (beats per minute))                     '145.895'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1930'
'TIT2' (Title/songname/content description)         'Black Snake Blues'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Victoria Spivey'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '15'
'TSSE' (Software/Hardware and settings used for encoding)  'Lame3.92'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['1920s', 'blues', 'jazz', 'female vocalists', '20s']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.51 dB'
'TXXX:replaygain_track_peak'                        '0.534548'

========================== row from database ==========================
                                              'id'  671990
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/v.a. - sissy man blues ( 1927-1936 )/18 - Victoria Spivey - Black Snake Blues.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  196
                                           'genre'  prerock-jb-blues
                                        'filesize'  4837174
                                           'mtime'  1620402845
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country v.a. sissy man blues 18 prerock jb blues
                                      'tag_artist'  Victoria Spivey
                                     'tag_release'  Sissy Man Blues (1927-1936)
                                       'tag_title'  Black Snake Blues
                                             'bpm'  145.895
                                    'search_title'  'black':1 'blues':3 'snake':2
                                   'search_artist'  'spivey':2 'victoria':1
                                  'search_release'  '1927':4 '19271936':6 '1936':5 'blues':3 'man':2 'sissy':1
                                     'search_rest'  '18':11 'a':6 'blues':10 'country':4 'exotica':2 'jazz':1 'jb':13 'man':9 'oldies':3 'prerock':12 'sissy':8 'v':5 'va':7
                                    'search_combo'  '18':22 '1927':9C '19271936':11C '1936':10C 'a':17 'black':1A 'blues':3A,8C,21 'country':15 'exotica':13 'jazz':12 'jb':24 'man':7C,20 'oldies':14 'prerock':23 'sissy':6C,19 'snake':2A 'spivey':5B 'v':16 'va':18 'victoria':4B
                                    'tag_tracknum'  15
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['1920s', 'blues', 'jazz', 'female vocalists', '20s']
                                        'tag_date'  1930
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1620402845.0217698  (2021-05-07 17:54:05)
                             'size'  4837174