Delay and feedback still have some problems

[chaosprint]

This is not correct:

~main: imp 1.0 >> add ~fb

~fb: ~main >> delayn 4410 >> mul 0.1

o: ~main >> mul 0.5

This is OK:

~main: imp 1.0 >> add ~fb

~fb: ~main >> delayn 4410 >> mul 0.1

o: ~main

Maybe it is caused by channels?