======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '246'
                                          'artist'  'Beastie Boys'
                                     'text_people'  ''
                                         'release'  'Solid Gold Hits'
                                           'title'  "No Sleep 'Til Brooklyn"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-3', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['alternative', 'hip hop', 'rap', 'rock']"
                                     'discogstags'  "['hip hop', 'pop rap']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '15'
                                            'date'  '1986'
                                        'comments'  ''
                                           'genre'  'hip hop or rnb or rap or turntablism'
                                             'bpm'  '97.178'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 00001599 00000B89 0000A5B1'
'COMM:iTunNORM:eng'                                 (' 00001599 00000B89 0000A5B1 000080B6 0001C3BC 0000A28D 00009128 00008FBF '
 '000078B6 0000A2DB')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000918 0000000000A5D2D8 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '15+B498E89C2B7BEDBF46682EA85B7AD585+6412437'
'TALB' (Album/Movie/Show title)                     'Solid Gold Hits'
'TBPM' (BPM (beats per minute))                     '97.178'
'TCON' (Content type, a.k.a. Genre)                 'hip hop or rnb or rap or turntablism'
'TDRC' (Recording time)                             '1986'
'TENC' (Encoded by)                                 'iTunes v6.0.1.3'
'TIT2' (Title/songname/content description)         "No Sleep 'Til Brooklyn"
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Beastie Boys'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '4/15'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '3'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['hip hop', 'pop rap']
'TXXX:lastfmtags'                                   ['alternative', 'hip hop', 'rap', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.08 dB'
'TXXX:replaygain_track_peak'                        '0.487921'

========================== row from database ==========================
                                              'id'  1509918
                                            'path'  /data/Music/Bulk/00poprockelectronic/Beasty Boys/Solid Gold Hits/04 No Sleep _Til Brooklyn.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  246
                                           'genre'  hip hop or rnb or rap or turntablism
                                        'filesize'  5014133
                                           'mtime'  1620567606
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Beasty 04 _Til hip hop or rnb or rap or turntablism
                                      'tag_artist'  Beastie Boys
                                     'tag_release'  Solid Gold Hits
                                       'tag_title'  No Sleep 'Til Brooklyn
                                             'bpm'  97.178
                                    'search_title'  'brooklyn':5 'no':1 'sleep':2 'til':3,4
                                   'search_artist'  'beastie':1 'boys':2
                                  'search_release'  'gold':2 'hits':3 'solid':1
                                     'search_rest'  '00poprockelectronic':1 'beasty':2 'hip':4 'hop':5 'or':6 'rap':8 'rnb':7 'til':3 'turntablism':9
                                    'search_combo'  '00poprockelectronic':11 'beastie':6B 'beasty':12 'boys':7B 'brooklyn':5A 'gold':9C 'hip':14 'hits':10C 'hop':15 'no':1A 'or':16 'rap':18 'rnb':17 'sleep':2A 'solid':8C 'til':3A,4A,13 'turntablism':19
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-3', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['alternative', 'hip hop', 'rap', 'rock']
                                        'tag_date'  1986
                                     'discogstags'  ['hip hop', 'pop rap']

============================== file details ==============================
                                           'mtime'  1620567606.2824345  (2021-05-09 15:40:06)
                             'size'  5014133