Is there any rule of thumb in choosing MUSIC FILTER algorithm?

I mean, I know FIR and IIR. But I am not sure which exact algorithm I should use. Anyone knows, say which filter algorithm SuperCollider RLPF is using?

Thanks in advance.

Filters with resonance and quickly responding parameter changes which would be suitable for things like synth voices are usually IIR. FIR filters are usually used for precision filtering in mastering situations and for filters in oversampling.

Miller Puckette’s book would be a good reference for this.