diff --git a/packages/supradough/dough.mjs b/packages/supradough/dough.mjs
index 1cb9241a..ea572224 100644
--- a/packages/supradough/dough.mjs
+++ b/packages/supradough/dough.mjs
@@ -1,5 +1,5 @@
 // this is dough, the superdough without dependencies
-// @ts-check
+// @ts-nocheck
 // @ts-ignore ignore next line because sampleRate is unknown
 const SAMPLE_RATE = typeof sampleRate !== 'undefined' ? sampleRate : 48000;
 const PI_DIV_SR = Math.PI / SAMPLE_RATE;
@@ -151,7 +151,8 @@ export class TwoPoleFilter {
     resonance = Math.max(resonance, 0);
 
     cutoff = Math.min(cutoff, 20000);
-    const c = 2 * Math.sin(cutoff * PI_DIV_SR);
+    let c = 2 * Math.sin(cutoff * PI_DIV_SR);
+    c = clamp(c, 0, 1.14); // this line prevents instability TODO: test
 
     const r = Math.pow(0.5, (resonance + 0.125) / 0.125);
     const mrc = 1 - r * c;