I have a version of moogladder that is much faster (manual example in
0.48s as against 1.8s).  No tables but avoids tanh calls for small and
large absolute arguments, as tanh is approx the same a x for |x|<0.5
and for |x|>4 it is sign(x).
comparing results for that test shows audio is the same.

Anyone wish to try?  Not yet committed to git