======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '160'
                                          'artist'  'LITTLE WILLIE JOHN Spasms KING'
                                     'text_people'  ''
                                         'release'  'Boogaloo Girl! (Youtube)'
                                           'title'  'LITTLE WILLIE JOHN Spasms KING'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-OLDST-2', 'Q-LOCALNESS-2', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'loc-varied'
                                             'bpm'  '123.7'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Boogaloo Girl! (Youtube)'
'TBPM' (BPM (beats per minute))                     '123.7'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'loc-varied'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'LITTLE WILLIE JOHN Spasms KING'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'LITTLE WILLIE JOHN Spasms KING'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TSO2'                                              'Various Artists'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf54.63.104'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:compatible_brands'                            'isomavc1mp42'
'TXXX:major_brand'                                  'mp42'
'TXXX:minor_version'                                '0'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.67 dB'
'TXXX:replaygain_track_peak'                        '0.277948'

========================== row from database ==========================
                                              'id'  724556
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Boogaloo Girl! (Youtube)/LITTLE WILLIE JOHN Spasms KING.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  160
                                           'genre'  loc-varied
                                        'filesize'  5622156
                                           'mtime'  1621854236
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm loc varied
                                      'tag_artist'  LITTLE WILLIE JOHN Spasms KING
                                     'tag_release'  Boogaloo Girl! (Youtube)
                                       'tag_title'  LITTLE WILLIE JOHN Spasms KING
                                             'bpm'  123.7
                                    'search_title'  'john':3 'king':5 'little':1 'spasms':4 'willie':2
                                   'search_artist'  'john':3 'king':5 'little':1 'spasms':4 'willie':2
                                  'search_release'  'boogaloo':1 'girl':2 'youtube':3,4
                                     'search_rest'  'loc':1 'varied':2
                                    'search_combo'  'boogaloo':11C 'girl':12C 'john':3A,8B 'king':5A,10B 'little':1A,6B 'loc':15 'spasms':4A,9B 'varied':16 'willie':2A,7B 'youtube':13C,14C
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621854235.6366127  (2021-05-24 13:03:55)
                             'size'  5622156