======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '320'
                                          'artist'  'Big Bad Voodoo Daddy'
                                     'text_people'  ''
                                         'release'  'Big Bad Voodoo Daddy'
                                           'title'  'Cruel Spell'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-JZFKS-2', 'Q-LOCALNESS-2', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'neo swing', 'swing']"
                                     'discogstags'  "['jazz', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-soft-swing'
                                             'bpm'  '129.8'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'APIC:Cover Image'                                  type PictureType.COVER_FRONT (Cover (front)) b'Cover Image'
                                     
'POPM:'                                             POPM(email='', rating=153, count=0)
'TALB' (Album/Movie/Show title)                     'Big Bad Voodoo Daddy'
'TBPM' (BPM (beats per minute))                     '129.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-soft-swing'
'TDRC' (Recording time)                             '1998'
'TIT2' (Title/songname/content description)         'Cruel Spell'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Big Bad Voodoo Daddy'
'TRCK' (Track number/Position in set)               '3'
'TXXX:FMPS_Rating'                                  '0.6'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['jazz', 'swing']
'TXXX:lastfmtags'                                   ['big band', 'jazz', 'neo swing', 'swing']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.13 dB'
'TXXX:replaygain_track_peak'                        '0.996211'

========================== row from database ==========================
                                              'id'  721466
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/Big Bad Voodoo Daddy/Big Bad Voodoo Daddy/MBZ;#Big Bad Voodoo Daddy;#Big Bad Voodoo Daddy;#03;#Cruel Spell.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  320
                                           'genre'  prerock-jb-jazz-soft-swing
                                        'filesize'  5179550
                                           'mtime'  1620540601
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul MBZ;#Big Daddy;#Big Daddy;#03;#Cruel prerock jb jazz soft swing
                                      'tag_artist'  Big Bad Voodoo Daddy
                                     'tag_release'  Big Bad Voodoo Daddy
                                       'tag_title'  Cruel Spell
                                             'bpm'  129.8
                                    'search_title'  'cruel':1 'spell':2
                                   'search_artist'  'bad':2 'big':1 'daddy':4 'voodoo':3
                                  'search_release'  'bad':2 'big':1 'daddy':4 'voodoo':3
                                     'search_rest'  '03':13,16 'big':5,7,9,11 'cruel':14,17 'daddy':8,10,12,15 'funk':2 'jazz':20 'jb':19 'mbz':4,6 'prerock':18 'soft':21 'soul':3 'swing':1
                                    'search_combo'  '03':23,26 'bad':4B,8C 'big':3B,7C,15,17,19,21 'cruel':1A,24,27 'daddy':6B,10C,18,20,22,25 'funk':12 'jazz':30 'jb':29 'mbz':14,16 'prerock':28 'soft':31 'soul':13 'spell':2A 'swing':11 'voodoo':5B,9C
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['big band', 'jazz', 'neo swing', 'swing']
                                        'tag_date'  1998
                                     'discogstags'  ['jazz', 'swing']

============================== file details ==============================
                                           'mtime'  1620540601.4898531  (2021-05-09 08:10:01)
                             'size'  5179550