“…. , ๐) would be arbitrarily chosen out of a group of all candidate values {๐ฅ๐(1), ๐ฅ๐(2), โฆ , ๐ฅ๐(๐๐)} with a probability of PRandom (random consideration); or it would be chosen out of a group of values kept in the HM with a probability of PMemory (memory consideration); or with a little change by moving to neighbor values ๐ฅ๐(๐ ยฑ ๐), with a probability of PPitch (pitch adjustment) [13].…”