======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '177'
                                          'artist'  'Baby Charles'
                                     'text_people'  ''
                                         'release'  'Baby Charles'
                                           'title'  'Step On'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-HHRNBTT-3', 'Q-UNU-1', "
 "'Q-JZFKS-3', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['funk', 'soul', 'deep funk', 'groove', 'broken beat']"
                                     'discogstags'  "['funk / soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '12'
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'hip hop or rnb or rap or turntablism'
                                             'bpm'  '138.512'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 00001C95 00001DB1 0000A912 0000F71F 00023449 00013E5E 000083FC 000084B1 '
 '0002515E 00023D29')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000AA4 000000000077724C 00000000 0040F493 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '12+D1F040C9F94466F749DDD1F0EE4F6496+10661086'
'TALB' (Album/Movie/Show title)                     'Baby Charles'
'TBPM' (BPM (beats per minute))                     '138.512'
'TCON' (Content type, a.k.a. Genre)                 'hip hop or rnb or rap or turntablism'
'TDRC' (Recording time)                             '2008'
'TENC' (Encoded by)                                 'iTunes v7.5.0.20'
'TIT2' (Title/songname/content description)         'Step On'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Baby Charles'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '7/12'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '3'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'funk / soul'
'TXXX:lastfmtags'                                   ['funk', 'soul', 'deep funk', 'groove', 'broken beat']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.83 dB'
'TXXX:replaygain_track_peak'                        '0.376913'

========================== row from database ==========================
                                              'id'  770873
                                            'path'  /data/Music/Bulk/00popandrock-hiphop-rap-rnb-turntablism/Baby Charles - STEP ON.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  177
                                           'genre'  hip hop or rnb or rap or turntablism
                                        'filesize'  4698277
                                           'mtime'  1620586884
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock hiphop rap rnb turntablism STEP ON hip hop or rnb or rap or turntablism
                                      'tag_artist'  Baby Charles
                                     'tag_release'  Baby Charles
                                       'tag_title'  Step On
                                             'bpm'  138.512
                                    'search_title'  'on':2 'step':1
                                   'search_artist'  'baby':1 'charles':2
                                  'search_release'  'baby':1 'charles':2
                                     'search_rest'  'hip':7 'hiphop':1 'hop':8 'on':6 'or':9 'rap':2 'rnb':3 'step':5 'turntablism':4
                                    'search_combo'  'baby':3B,5C 'charles':4B,6C 'hip':13 'hiphop':7 'hop':14 'on':2A,12 'or':15 'rap':8 'rnb':9 'step':1A,11 'turntablism':10
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-3', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-3', 'q-syn-3', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['funk', 'soul', 'deep funk', 'groove', 'broken beat']
                                        'tag_date'  2008
                                     'discogstags'  ['funk / soul']

============================== file details ==============================
                                           'mtime'  1620586883.738492  (2021-05-09 21:01:23)
                             'size'  4698277