In modern 24 bit mode , algoritm 5 and 6 behave exactly the same , algoritm 6 ( which has 2 operators in the feedback loop ) behaves exactly like algoritm 5 ( only one operator in feedback loop )

Algoritm 4 in 24 bit mode is also wrong ( 3 operators in feedback loop ) when compared to original dx7 or mark 1 settings .
Cheers
