I made a patch which uses the RBJ cookbook to calculate LPF coefficients for biquad~ in MSP, which is below. Don't have the time right now to make a PD version, but cyclone should mostly load it.
not out of the box... After import, the adjustments needed are
well, I did say *mostly*.... knew about most of the gotchas you mentioned, except...
- replace each of the three [/~ 1] with [/~]
why? does adding the argument in PD make it incapable of receiving new ones or something? Ah- nevermind, I checked the sigbinops help, and it types the inlet. Ok.....
forgot to add: the biquad~ in Pd cannot be signal-controlled... besides, the list should start from feedback coefs, while msp takes them the other way around.
ah, interesting. Did not know that last bit about the order... (Like I said, no time to do it in PD myself right now). Good to know...
Jer