Not 100% sure, but I think all filters in the stack should have the same cutoff frequency:
input | [lop~ 10] | [lop~ 10] | [lop~ 10] | [lop~ 10] | output
To be sure, I would personaly use the iemlib filters though the above model "sounds" quite good
Pall Thayer palli@pallit.lhi.is:
Yeah, I thought about that but does one then set each of the lop~'s for 10Hz or try to spread the 10 between them like:
[lop~ 2.5]*4 or [lop~ 10]*4
?