======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '229'
                                          'artist'  'Amazing Kreskin'
                                     'text_people'  ''
                                         'release'  'Basic Principles Of ESP'
                                           'title'  'A Basic Introduction To E.S.P.'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '01'
                                      'tracktotal'  ''
                                            'date'  '1967'
                                        'comments'  ''
                                           'genre'  'nonmusic-speech'
                                             'bpm'  '129.813'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         '365 Days Project'
'COMM:ID3v1 Comment:XXX'                            '365 Days Project'
'COMM:MusicMatch_Preference:eng'                    'blog.wfmu.org'
'TALB' (Album/Movie/Show title)                     'Basic Principles Of ESP'
'TBPM' (BPM (beats per minute))                     '129.813'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-speech'
'TDRC' (Recording time)                             '1967'
'TIT2' (Title/songname/content description)         'A Basic Introduction To E.S.P.'
'TKEY' (Initial key)                                '1A'
'TLEN' (Length)                                     '229537'
'TPE1' (Lead performer(s)/Soloist(s))               'Amazing Kreskin'
'TRCK' (Track number/Position in set)               '01'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.40 dB'
'TXXX:replaygain_track_peak'                        '0.769332'

========================== row from database ==========================
                                              'id'  1296974
                                            'path'  /data/Music/Bulk/00poprockelectronic/11/305_01_Kreskin_-_A_Basic_Introduction_To_ESP.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  229
                                           'genre'  nonmusic-speech
                                        'filesize'  4434087
                                           'mtime'  1637329946
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 11 305_01_Kreskin_ _A_Basic_Introduction_To_ESP nonmusic speech
                                      'tag_artist'  Amazing Kreskin
                                     'tag_release'  Basic Principles Of ESP
                                       'tag_title'  A Basic Introduction To E.S.P.
                                             'bpm'  129.813
                                    'search_title'  'a':1 'basic':2 'e':5 'esp':8 'introduction':3 'p':7 's':6 'to':4
                                   'search_artist'  'amazing':1 'kreskin':2
                                  'search_release'  'basic':1 'esp':4 'of':3 'principles':2
                                     'search_rest'  '00poprockelectronic':1 '01':3 '305':2 'a':5 'basic':6 'esp':9 'introduction':7 'kreskin':4 'nonmusic':10 'speech':11 'to':8
                                    'search_combo'  '00poprockelectronic':15 '01':17 '305':16 'a':1A,19 'amazing':9B 'basic':2A,11C,20 'e':5A 'esp':8A,14C,23 'introduction':3A,21 'kreskin':10B,18 'nonmusic':24 'of':13C 'p':7A 'principles':12C 's':6A 'speech':25 'to':4A,22
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1967
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329946.070868  (2021-11-19 14:52:26)
                             'size'  4434087