@kassen<br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="gmail_quote"><div>These, IMHO, need to be fixed, as something is plainly buggy there. How much time would this take from somebody who is fluent in C/C++ (needed to evaluate the rounding possibility) and not too scared of the Z-plane stuff? I&#39;d look into it myself but I&#39;d be out of my league in both fields.</div>

</div></blockquote><div><br>I&#39;ve asked a friend who&#39;s knowledgeable about DSP. He had a look at the ChucK source and seems optimistic that he (or one of his peers) may be able to find a solution for achieving stable, sweepable filter(s). Hard to say whether it will work out at this early stage though.<br>

</div></div>