diff --git a/packages/core/controls.mjs b/packages/core/controls.mjs
index 1df00f1a..79dc33ab 100644
--- a/packages/core/controls.mjs
+++ b/packages/core/controls.mjs
@@ -766,6 +766,15 @@ export const { bprelease, bpr } = registerControl('bprelease', 'bpr');
  * .ftype("<ladder 12db 24db>")
  */
 export const { ftype } = registerControl('ftype');
+
+/**
+ * controls the center of the filter envelope. 0 is unipolar positive, .5 is bipolar, 1 is unipolar negative
+ * @name fanchor
+ * @param {number | Pattern} center 0 to 1
+ * @example
+ * note("{f g g c d a a#}%8").s("sawtooth").lpf("{1000}%2")
+ * .lpenv(8).fanchor("<0 .5 1>")
+ */
 export const { fanchor } = registerControl('fanchor');
 /**
  * Applies the cutoff frequency of the **h**igh-**p**ass **f**ilter.
diff --git a/packages/superdough/superdough.mjs b/packages/superdough/superdough.mjs
index 018caa9a..5488b404 100644
--- a/packages/superdough/superdough.mjs
+++ b/packages/superdough/superdough.mjs
@@ -24,6 +24,52 @@ export function getSound(s) {
   return soundMap.get()[s];
 }
 
+const defaultDefaultValues = {
+  s: 'triangle',
+  gain: 0.8,
+  postgain: 1,
+  density: '.03',
+  ftype: '12db',
+  fanchor: 0,
+  resonance: 1,
+  hresonance: 1,
+  bandq: 1,
+  channels: [1, 2],
+  phaserdepth: 0.75,
+  shapevol: 1,
+  distortvol: 1,
+  delay: 0,
+  delayfeedback: 0.5,
+  delaytime: 0.25,
+  orbit: 1,
+  i: 1,
+  velocity: 1,
+  fft: 8,
+};
+
+let defaultControls = new Map(Object.entries(defaultDefaultValues));
+
+export function setDefaultValue(key, value) {
+  defaultControls.set(key, value);
+}
+export function getDefaultValue(key) {
+  return defaultControls.get(key);
+}
+export function setDefaultValues(defaultsobj) {
+  Object.keys(defaultsobj).forEach((key) => {
+    setDefaultValue(key, defaultsobj[key]);
+  });
+}
+export function resetDefaultValues() {
+  defaultControls = new Map(Object.entries(defaultDefaultValues));
+}
+export function setVersionDefaults(version) {
+  resetDefaultValues();
+  if (version === '1.0') {
+    setDefaultValue('fanchor', 0.5);
+  }
+}
+
 export const resetLoadedSounds = () => soundMap.set({});
 
 let audioContext;
@@ -276,15 +322,14 @@ export const superdough = async (value, t, hapDuration) => {
   }
   // destructure
   let {
-    s = 'triangle',
+    s = getDefaultValue('s'),
     bank,
     source,
-    gain = 0.8,
-    postgain = 1,
-    density = 0.03,
+    gain = getDefaultValue('gain'),
+    postgain = getDefaultValue('postgain'),
+    density = getDefaultValue('density'),
     // filters
-
-    fanchor = 0.5,
+    fanchor = getDefaultValue('fanchor'),
     drive = 0.69,
     // low pass
     cutoff,
@@ -293,7 +338,7 @@ export const superdough = async (value, t, hapDuration) => {
     lpdecay,
     lpsustain,
     lprelease,
-    resonance = 1,
+    resonance = getDefaultValue('resonance'),
     // high pass
     hpenv,
     hcutoff,
@@ -301,7 +346,7 @@ export const superdough = async (value, t, hapDuration) => {
     hpdecay,
     hpsustain,
     hprelease,
-    hresonance = 1,
+    hresonance = getDefaultValue('hresonance'),
     // band pass
     bpenv,
     bandf,
@@ -309,36 +354,36 @@ export const superdough = async (value, t, hapDuration) => {
     bpdecay,
     bpsustain,
     bprelease,
-    bandq = 1,
-    channels = [1, 2],
+    bandq = getDefaultValue('bandq'),
+    channels = getDefaultValue('channels'),
     //phaser
     phaser,
-    phaserdepth = 0.75,
+    phaserdepth = getDefaultValue('phaserdepth'),
     phasersweep,
     phasercenter,
     //
     coarse,
     crush,
     shape,
-    shapevol = 1,
+    shapevol = getDefaultValue('shapevol'),
     distort,
-    distortvol = 1,
+    distortvol = getDefaultValue('distortvol'),
     pan,
     vowel,
-    delay = 0,
-    delayfeedback = 0.5,
-    delaytime = 0.25,
-    orbit = 1,
+    delay = getDefaultValue('delay'),
+    delayfeedback = getDefaultValue('delayfeedback'),
+    delaytime = getDefaultValue('delaytime'),
+    orbit = getDefaultValue('orbit'),
     room,
     roomfade,
     roomlp,
     roomdim,
     roomsize,
     ir,
-    i = 0,
-    velocity = 1,
+    i = getDefaultValue('i'),
+    velocity = getDefaultValue('velocity'),
     analyze, // analyser wet
-    fft = 8, // fftSize 0 - 10
+    fft = getDefaultValue('fft'), // fftSize 0 - 10
     compressor: compressorThreshold,
     compressorRatio,
     compressorKnee,
diff --git a/test/__snapshots__/examples.test.mjs.snap b/test/__snapshots__/examples.test.mjs.snap
index ddbb6f91..efc5dda0 100644
--- a/test/__snapshots__/examples.test.mjs.snap
+++ b/test/__snapshots__/examples.test.mjs.snap
@@ -2562,6 +2562,43 @@ exports[`runs examples > example "every" example index 0 1`] = `
 ]
 `;
 
+exports[`runs examples > example "fanchor" example index 0 1`] = `
+[
+  "[ 0/1 → 1/8 | note:f s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 1/8 → 1/4 | note:g s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 1/4 → 3/8 | note:g s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 3/8 → 1/2 | note:c s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 1/2 → 5/8 | note:d s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 5/8 → 3/4 | note:a s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 3/4 → 7/8 | note:a# s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 7/8 → 1/1 | note:f s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 1/1 → 9/8 | note:g s:sawtooth cutoff:1000 lpenv:8 fanchor:0.5 ]",
+  "[ 9/8 → 5/4 | note:g s:sawtooth cutoff:1000 lpenv:8 fanchor:0.5 ]",
+  "[ 5/4 → 11/8 | note:c s:sawtooth cutoff:1000 lpenv:8 fanchor:0.5 ]",
+  "[ 11/8 → 3/2 | note:d s:sawtooth cutoff:1000 lpenv:8 fanchor:0.5 ]",
+  "[ 3/2 → 13/8 | note:a s:sawtooth cutoff:1000 lpenv:8 fanchor:0.5 ]",
+  "[ 13/8 → 7/4 | note:a# s:sawtooth cutoff:1000 lpenv:8 fanchor:0.5 ]",
+  "[ 7/4 → 15/8 | note:f s:sawtooth cutoff:1000 lpenv:8 fanchor:0.5 ]",
+  "[ 15/8 → 2/1 | note:g s:sawtooth cutoff:1000 lpenv:8 fanchor:0.5 ]",
+  "[ 2/1 → 17/8 | note:g s:sawtooth cutoff:1000 lpenv:8 fanchor:1 ]",
+  "[ 17/8 → 9/4 | note:c s:sawtooth cutoff:1000 lpenv:8 fanchor:1 ]",
+  "[ 9/4 → 19/8 | note:d s:sawtooth cutoff:1000 lpenv:8 fanchor:1 ]",
+  "[ 19/8 → 5/2 | note:a s:sawtooth cutoff:1000 lpenv:8 fanchor:1 ]",
+  "[ 5/2 → 21/8 | note:a# s:sawtooth cutoff:1000 lpenv:8 fanchor:1 ]",
+  "[ 21/8 → 11/4 | note:f s:sawtooth cutoff:1000 lpenv:8 fanchor:1 ]",
+  "[ 11/4 → 23/8 | note:g s:sawtooth cutoff:1000 lpenv:8 fanchor:1 ]",
+  "[ 23/8 → 3/1 | note:g s:sawtooth cutoff:1000 lpenv:8 fanchor:1 ]",
+  "[ 3/1 → 25/8 | note:c s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 25/8 → 13/4 | note:d s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 13/4 → 27/8 | note:a s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 27/8 → 7/2 | note:a# s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 7/2 → 29/8 | note:f s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 29/8 → 15/4 | note:g s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 15/4 → 31/8 | note:g s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+  "[ 31/8 → 4/1 | note:c s:sawtooth cutoff:1000 lpenv:8 fanchor:0 ]",
+]
+`;
+
 exports[`runs examples > example "fast" example index 0 1`] = `
 [
   "[ 0/1 → 1/8 | s:bd ]",
diff --git a/website/src/repl/Repl.jsx b/website/src/repl/Repl.jsx
index aabefcdc..b892005e 100644
--- a/website/src/repl/Repl.jsx
+++ b/website/src/repl/Repl.jsx
@@ -94,6 +94,13 @@ export function Repl({ embedded = false }) {
         window.location.hash = '#' + code2hash(code);
         setDocumentTitle(code);
         const viewingPatternData = getViewingPatternData();
+        try {
+          const metadata = getMetadata(code);
+          setVersionDefaults(metadata.version);
+        } catch (err) {
+          console.error('Error parsing metadata..');
+          console.error(err);
+        }
         const data = { ...viewingPatternData, code };
         let id = data.id;
         const isExamplePattern = viewingPatternData.collection !== userPattern.collection;