diff --git a/packages/core/pattern.mjs b/packages/core/pattern.mjs
index 8968b508f..1b4ac6b26 100644
--- a/packages/core/pattern.mjs
+++ b/packages/core/pattern.mjs
@@ -886,6 +886,10 @@ export class Pattern {
     return stackRight(this, ...pats);
   }
 
+  stackCenter(...pats) {
+    return stackCenter(this, ...pats);
+  }
+
   stackCentre(...pats) {
     return stackCentre(this, ...pats);
   }
@@ -1666,7 +1670,7 @@ function _stackWith(func, pats) {
 }
 
 /**
- * The input patterns are aligned to the left, with silence padded to the shorter pattern(s) in the final steps if there's a stepcount disparity. See also `stackRight` and `stackCentre/stackCenter`
+ * The input patterns are aligned to the left, with silence padded to the shorter pattern(s) in the final steps if there's a stepcount disparity. See also `stackRight` and `stackCenter/stackCentre`
  *
  * @name stackLeft
  * @tags temporal, stepwise, combiners
@@ -1685,7 +1689,7 @@ export function stackLeft(...pats) {
 }
 
 /**
- * The input patterns are aligned to the right, with silence padded to the shorter pattern(s) in the initial steps if there's a stepcount disparity. See also `stackLeft` and `stackCentre/stackCenter`
+ * The input patterns are aligned to the right, with silence padded to the shorter pattern(s) in the initial steps if there's a stepcount disparity. See also `stackLeft` and `stackCenter/stackCentre`
  *
  * @name stackRight
  * @tags temporal, stepwise, combiners
@@ -1705,17 +1709,17 @@ export function stackRight(...pats) {
 
 /**
  * The input patterns are aligned to the right, with silence padded to the shorter pattern(s) in the initial steps if there's a stepcount disparity. See also `stackLeft` and `stackRight`
- * @name stackCentre
+ * @name stackCenter
  * @tags temporal, stepwise, combiners
- * @synonyms stackCenter
+ * @synonyms stackCentre
  * @return {Pattern}
  * @example
- * stackCentre("0 1 2 3", "3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
+ * stackCenter("0 1 2 3", "3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
  * @example
  * // chainable
- * "0 1 2 3".stackCentre("3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
+ * "0 1 2 3".stackCenter("3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
  */
-export function stackCentre(...pats) {
+export function stackCenter(...pats) {
   return _stackWith(
     (steps, pats) =>
       pats.map((pat) => {
@@ -1729,8 +1733,8 @@ export function stackCentre(...pats) {
   );
 }
 
-export function stackCenter(pats) {
-  return stackCentre(pats);
+export function stackCentre(...pats) {
+  return stackCenter(...pats);
 }
 
 /**
diff --git a/packages/core/signal.mjs b/packages/core/signal.mjs
index 83a35d677..0316c86fe 100644
--- a/packages/core/signal.mjs
+++ b/packages/core/signal.mjs
@@ -6,6 +6,7 @@ This program is free software: you can redistribute it and/or modify it under th
 
 import { Hap } from './hap.mjs';
 import { Pattern, fastcat, pure, register, reify, silence, stack, sequenceP, isPattern } from './pattern.mjs';
+import { _mod } from './util.mjs';
 import Fraction from './fraction.mjs';
 
 import { id, keyAlias, getCurrentKeyboardState } from './util.mjs';
diff --git a/test/__snapshots__/examples.test.mjs.snap b/test/__snapshots__/examples.test.mjs.snap
index 1d8d69922..d1e8599f3 100644
--- a/test/__snapshots__/examples.test.mjs.snap
+++ b/test/__snapshots__/examples.test.mjs.snap
@@ -7908,15 +7908,6 @@ exports[`runs examples > example "midi" example index 0 1`] = `
 ]
 `;
 
-exports[`runs examples > example "midi" example index 1 1`] = `
-[
-  "[ 0/1 → 1/1 | note:c4 midichan:1 ]",
-  "[ 1/1 → 2/1 | note:c4 midichan:1 ]",
-  "[ 2/1 → 3/1 | note:c4 midichan:1 ]",
-  "[ 3/1 → 4/1 | note:c4 midichan:1 ]",
-]
-`;
-
 exports[`runs examples > example "midibend" example index 0 1`] = `
 [
   "[ 0/1 → 1/1 | note:c4 midibend:0 ]",
@@ -13144,7 +13135,7 @@ exports[`runs examples > example "stack" example index 1 1`] = `
 ]
 `;
 
-exports[`runs examples > example "stackCentre" example index 0 1`] = `
+exports[`runs examples > example "stackCenter" example index 0 1`] = `
 [
   "[ 0/1 → 1/15 | note:G3 ]",
   "[ 1/15 → 2/15 | note:Ab3 ]",
@@ -13201,7 +13192,7 @@ exports[`runs examples > example "stackCentre" example index 0 1`] = `
 ]
 `;
 
-exports[`runs examples > example "stackCentre" example index 1 1`] = `
+exports[`runs examples > example "stackCenter" example index 1 1`] = `
 [
   "[ 0/1 → 1/15 | note:G3 ]",
   "[ 1/15 → 2/15 | note:Ab3 ]",