Sorry, I put the wrong pole equation. It is actually: (1/k')^(0.5) * sn( ( 2n -1) *pi/4N,k) / cn( ( 2n -1) *pi/4N,k) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20210108/205854c6/attachment.htm>