======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '238'
                                          'artist'  'Peter King'
                                     'text_people'  ''
                                         'release'  'World tracks from various countries and albums'
                                           'title'  'Ajo'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-UNU-2', 'q-syn-1', 'q-bass-4', 'q-busy-3', "
 "'q-grit-2', 'q-play-2', 'Q-OLDST-1', 'q-chart-1', 'q-drums-4', 'q-other-3', "
 "'q-piano-1', 'q-vocals-2', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-3']")
                                      'lastfmtags'  "['afrobeat', 'jazz', 'funk', 'african', 'nigeria']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '02'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-unsorted'
                                             'bpm'  '106.419'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'World tracks from various countries and albums'
'TBPM' (BPM (beats per minute))                     '106.419'
'TCON' (Content type, a.k.a. Genre)                 'loc-unsorted'
'TIT2' (Title/songname/content description)         'Ajo'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Peter King'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '02'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['afrobeat', 'jazz', 'funk', 'african', 'nigeria']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.04 dB'
'TXXX:replaygain_track_peak'                        '0.375108'

========================== row from database ==========================
                                              'id'  1528179
                                            'path'  /data/Music/Bulk/0soundtrack/VA - __World__ tracks from various countries & albums/World [vBr]/Africafunk - Volume 1 - 02 - Peter King - Ajo.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  238
                                           'genre'  loc-unsorted
                                        'filesize'  5727433
                                           'mtime'  1621630390
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack VA __World__ & [vBr] Africafunk Volume 1 02 loc unsorted
                                      'tag_artist'  Peter King
                                     'tag_release'  World tracks from various countries and albums
                                       'tag_title'  Ajo
                                             'bpm'  106.419
                                    'search_title'  'ajo':1
                                   'search_artist'  'king':2 'peter':1
                                  'search_release'  'albums':7 'and':6 'countries':5 'from':3 'tracks':2 'various':4 'world':1
                                     'search_rest'  '0soundtrack':1 '1':8 'africafunk':6 'br':13,14 'loc':9 'unsorted':10 'v':11,12 'va':2 'vbr':4,5 'volume':7 'world':3
                                    'search_combo'  '0soundtrack':11 '1':18 'africafunk':16 'ajo':1A 'albums':10C 'and':9C 'br':23,24 'countries':8C 'from':6C 'king':3B 'loc':19 'peter':2B 'tracks':5C 'unsorted':20 'v':21,22 'va':12 'various':7C 'vbr':14,15 'volume':17 'world':4C,13
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['afrobeat', 'jazz', 'funk', 'african', 'nigeria']
                                        'tag_date'  
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1621630389.8698394  (2021-05-21 22:53:09)
                             'size'  5727433