diff --git a/packages/supradough/dough-export.mjs b/packages/supradough/dough-export.mjs
index 5f8b9a8e..a9f5614b 100644
--- a/packages/supradough/dough-export.mjs
+++ b/packages/supradough/dough-export.mjs
@@ -47,7 +47,8 @@ haps.forEach((hap) => {
 console.log(`render ${seconds}s long buffer...`);
 const buffer = new Float32Array(seconds * sampleRate);
 while (dough.t <= buffer.length) {
-  buffer[dough.t] = dough.update();
+  dough.update();
+  buffer[dough.t] = dough.out[0];
 }
 console.log('done!');
 
diff --git a/packages/supradough/dough.mjs b/packages/supradough/dough.mjs
index b11de6c2..aa2e1dfd 100644
--- a/packages/supradough/dough.mjs
+++ b/packages/supradough/dough.mjs
@@ -150,7 +150,7 @@ class PulseOsc {
     return 2 * phase - 1 - p;
   }
   update(freq, pw = 0.5) {
-    const dt = freq / sampleRate;
+    const dt = freq / SAMPLE_RATE;
     let pulse = this.saw(0, dt) - this.saw(pw, dt);
     this.phase = (this.phase + dt) % 1;
     return pulse + pw * 2 - 1;