======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '303'
                                          'artist'  'Sugarhill Gang'
                                     'text_people'  ''
                                         'release'  'Millennium Funk Party'
                                           'title'  "Rapper's Delight"
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-3', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['hip-hop', 'rap', 'old school', 'hip hop', '80s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '20'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '111.1'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Millennium Funk Party'
'TBPM' (BPM (beats per minute))                     '111.1'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         "Rapper's Delight"
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Sugarhill Gang'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '20'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '3'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['hip-hop', 'rap', 'old school', 'hip hop', '80s']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.55 dB'
'TXXX:replaygain_track_peak'                        '0.510622'

========================== row from database ==========================
                                              'id'  1520444
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/Millennium Funk Party [2000]/Sugarhill Gang - 20 - Rapper_s Delight.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  303
                                           'genre'  funk or soul
                                        'filesize'  7289955
                                           'mtime'  1621695590
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul [2000] 20 Rapper_s funk or soul
                                      'tag_artist'  Sugarhill Gang
                                     'tag_release'  Millennium Funk Party
                                       'tag_title'  Rapper's Delight
                                             'bpm'  111.1
                                    'search_title'  'delight':4 'rapper':1 'rappers':3 's':2
                                   'search_artist'  'gang':2 'sugarhill':1
                                  'search_release'  'funk':2 'millennium':1 'party':3
                                     'search_rest'  '20':6 '2000':4,5 'funk':2 'or':9 'rapper':7 's':8 'soul':3 'swing':1
                                    'search_combo'  '20':15 '2000':13,14 'delight':4A 'funk':8C,11 'gang':6B 'millennium':7C 'or':18 'party':9C 'rapper':1A,16 'rappers':3A 's':2A,17 'soul':12 'sugarhill':5B 'swing':10
                                    'tag_tracknum'  20
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-3', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-1', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['hip-hop', 'rap', 'old school', 'hip hop', '80s']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621695590.4837956  (2021-05-22 16:59:50)
                             'size'  7289955