Thanks a lot @manuels, I guess I either have to take a 4 pole for granted or go with rfft~

More off-topic, I don't know what setting I may have that causes this, but even your extended compatible patch refuses to output any sound until I convert the cutoff signal to a float for the four lop~ objects.

@elwinbran Signal rate control input just came to [lop~] in the last release or so and I do not think [inlet~] passed floats back in the extended days either, don't quite recall on that one. Just replace that [inlet~] with the message rate [inlet] and stick to message rate for cutoff.