======================== unified (from filesystem) ========================
                                         'bitrate'  '160.148'
                                        'duration'  '110'
                                          'artist'  'Mongolia'
                                     'text_people'  ''
                                         'release'  'Songs of the Earth - Astonishing and Rare Voices'
                                           'title'  'The 4-Year-Old Light Tan Horse'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['stoner rock', 'ambient', 'sludge', 'downtempo', 'sludge metal']"
                                     'discogstags'  "['downtempo', 'trip hop', 'electronic', 'ambient']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '04'
                                      'tracktotal'  ''
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'loc-unsorted-mix'
                                             'bpm'  '140.335'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Songs of the Earth - Astonishing and Rare Voices'
'TBPM' (BPM (beats per minute))                     '140.335'
'TCON' (Content type, a.k.a. Genre)                 'loc-unsorted-mix'
'TDRC' (Recording time)                             '1998'
'TIT2' (Title/songname/content description)         'The 4-Year-Old Light Tan Horse'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Mongolia'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '04'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['downtempo', 'trip hop', 'electronic', 'ambient']
'TXXX:lastfmtags'                                   ['stoner rock', 'ambient', 'sludge', 'downtempo', 'sludge metal']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'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'                        '+1.26 dB'
'TXXX:replaygain_track_peak'                        '0.345723'

========================== row from database ==========================
                                              'id'  476733
                                            'path'  /data/Music/Bulk/00localcharacter/VA. World 1： Trad/Songs Of The Earth： Astonishing and Rare Voices (Auvidis, Unesco, 1998) [160k]/04 - Mongolia - The 4-Year-Old Light Tan Horse.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  110
                                           'genre'  loc-unsorted-mix
                                        'filesize'  2213296
                                           'mtime'  1647350747
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter VA. World 1： Trad Of Earth： (Auvidis, Unesco, 1998) [160k] 04 loc unsorted mix
                                      'tag_artist'  Mongolia
                                     'tag_release'  Songs of the Earth - Astonishing and Rare Voices
                                       'tag_title'  The 4-Year-Old Light Tan Horse
                                             'bpm'  140.335
                                    'search_title'  '4':2 '4yearold':5 'horse':8 'light':6 'old':4 'tan':7 'the':1 'year':3
                                   'search_artist'  'mongolia':1
                                  'search_release'  'and':6 'astonishing':5 'earth':4 'of':2 'rare':7 'songs':1 'the':3 'voices':8
                                     'search_rest'  '1':4,5,6 '160k':18,19 '1998':16,17 'auvidis':12,13 'earth':9,10,11 'loc':20 'mix':22 'of':8 'trad':7 'unesco':14,15 'unsorted':21 'va':1,2 'world':3
                                    'search_combo'  '1':21,22,23 '160k':35,36 '1998':33,34 '4':2A '4yearold':5A 'and':15C 'astonishing':14C 'auvidis':29,30 'earth':13C,26,27,28 'horse':8A 'light':6A 'loc':37 'mix':39 'mongolia':9B 'of':11C,25 'old':4A 'rare':16C 'songs':10C 'tan':7A 'the':1A,12C 'trad':24 'unesco':31,32 'unsorted':38 'va':18,19 'voices':17C 'world':20 'year':3A
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']
                                      'lastfmtags'  ['stoner rock', 'ambient', 'sludge', 'downtempo', 'sludge metal']
                                        'tag_date'  1998
                                     'discogstags'  ['downtempo', 'trip hop', 'electronic', 'ambient']

============================== file details ==============================
                                           'mtime'  1647350747.0501783  (2022-03-15 14:25:47)
                             'size'  2213296