diff --git a/packages/core/pattern.mjs b/packages/core/pattern.mjs
index 5d67026c..a65a72e9 100644
--- a/packages/core/pattern.mjs
+++ b/packages/core/pattern.mjs
@@ -1415,25 +1415,32 @@ export function register(name, func, patternify = true) {
   const arity = func.length;
   var pfunc; // the patternified function
 
-  pfunc = function (...args) {
-    args = args.map(reify);
-    const pat = args[args.length - 1];
-    if (arity === 1) {
-      return func(pat);
-    }
-    const [left, ...right] = args.slice(0, -1);
-    let mapFn = (...args) => {
-      // make sure to call func with the correct argument count
-      // args.length is expected to be <= arity-1
-      // so we set undefined args explicitly undefined
-      Array(arity - 1)
-        .fill()
-        .map((_, i) => args[i] ?? undefined);
-      return func(...args, pat);
+  if (patternify) {
+    pfunc = function (...args) {
+      args = args.map(reify);
+      const pat = args[args.length - 1];
+      if (arity === 1) {
+        return func(pat);
+      }
+      const [left, ...right] = args.slice(0, -1);
+      let mapFn = (...args) => {
+        // make sure to call func with the correct argument count
+        // args.length is expected to be <= arity-1
+        // so we set undefined args explicitly undefined
+        Array(arity - 1)
+          .fill()
+          .map((_, i) => args[i] ?? undefined);
+        return func(...args, pat);
+      };
+      mapFn = curry(mapFn, null, arity - 1);
+      return right.reduce((acc, p) => acc.appLeft(p), left.fmap(mapFn)).innerJoin();
     };
-    mapFn = curry(mapFn, null, arity - 1);
-    return right.reduce((acc, p) => acc.appLeft(p), left.fmap(mapFn)).innerJoin();
-  };
+  } else {
+    pfunc = function (...args) {
+      args = args.map(reify);
+      return func(...args);
+    };
+  }
 
   Pattern.prototype[name] = function (...args) {
     // For methods that take a single argument (plus 'this'), allow
@@ -2231,11 +2238,13 @@ const _loopAt = function (factor, pat, cps = 1) {
  * @example
  * await samples('github:tidalcycles/Dirt-Samples/master')
  * s("breaks165").slice(8, "0 1 <2 2*2> 3 [4 0] 5 6 7".every(3, rev)).slow(1.5)
+ */
+
 const slice = register(
   'slice',
   function (npat, ipat, opat) {
     return npat.innerBind((n) =>
-    ipat.outerBind((i) =>
+      ipat.outerBind((i) =>
         opat.outerBind((o) => {
           // If it's not an object, assume it's a string and make it a 's' control parameter
           o = o instanceof Object ? o : { s: o };
@@ -2248,7 +2257,6 @@ const slice = register(
   },
   false, // turns off auto-patternification
 );
-*/
 
 /*
  * Works the same as slice, but changes the playback speed of each slice to match the duration of its step.
@@ -2258,6 +2266,8 @@ const slice = register(
  * @example
  * await samples('github:tidalcycles/Dirt-Samples/master')
  * s("breaks165").splice(8,  "0 1 [2 3 0]@2 3 0@2 7").hurry(0.65)
+ */
+
 const splice = register(
   'splice',
   function (npat, ipat, opat) {
@@ -2273,8 +2283,7 @@ const splice = register(
     });
   },
   false, // turns off auto-patternification
-  );
-  */
+);
 
 const { loopAt, loopat } = register(['loopAt', 'loopat'], function (factor, pat) {
   return _loopAt(factor, pat, 1);
diff --git a/packages/core/repl.mjs b/packages/core/repl.mjs
index b5d8cb92..308b76ce 100644
--- a/packages/core/repl.mjs
+++ b/packages/core/repl.mjs
@@ -21,7 +21,7 @@ export function repl({
     onTrigger: async (hap, deadline, duration, cps) => {
       try {
         if (!hap.context.onTrigger || !hap.context.dominantTrigger) {
-          await defaultOutput(hap, deadline, duration);
+          await defaultOutput(hap, deadline, duration, cps);
         }
         if (hap.context.onTrigger) {
           // call signature of output / onTrigger is different...
diff --git a/packages/core/test/pattern.test.mjs b/packages/core/test/pattern.test.mjs
index 43838c53..c8267306 100644
--- a/packages/core/test/pattern.test.mjs
+++ b/packages/core/test/pattern.test.mjs
@@ -976,6 +976,7 @@ describe('Pattern', () => {
       sameFirst(n(0, 1).weave(2, s('bd', silence), s(silence, 'sd')), sequence(s('bd').n(0), s('sd').n(1)));
     });
   });
+  */
   describe('slice', () => {
     it('Can slice a sample', () => {
       sameFirst(
@@ -1001,5 +1002,5 @@ describe('Pattern', () => {
         ),
       );
     });
-  });*/
+  });
 });
diff --git a/packages/webaudio/webaudio.mjs b/packages/webaudio/webaudio.mjs
index b377b9e3..1f4e3375 100644
--- a/packages/webaudio/webaudio.mjs
+++ b/packages/webaudio/webaudio.mjs
@@ -191,7 +191,7 @@ function effectSend(input, effect, wet) {
 }
 
 // export const webaudioOutput = async (t, hap, ct, cps) => {
-export const webaudioOutput = async (hap, deadline, hapDuration) => {
+export const webaudioOutput = async (hap, deadline, hapDuration, cps) => {
   const ac = getAudioContext();
   hap.ensureObjectValue();
 
@@ -305,7 +305,7 @@ export const webaudioOutput = async (hap, deadline, hapDuration) => {
     bufferSource.playbackRate.value = Math.abs(speed) * bufferSource.playbackRate.value;
     if (unit === 'c') {
       // are there other units?
-      bufferSource.playbackRate.value = bufferSource.playbackRate.value * bufferSource.buffer.duration;
+      bufferSource.playbackRate.value = bufferSource.playbackRate.value * bufferSource.buffer.duration * cps;
     }
     let duration = soundfont || clip ? hapDuration : bufferSource.buffer.duration / bufferSource.playbackRate.value;
     // "The computation of the offset into the sound is performed using the sound buffer's natural sample rate,
@@ -378,7 +378,7 @@ export const webaudioOutput = async (hap, deadline, hapDuration) => {
   chain[0].onended = () => chain.concat([delaySend, reverbSend]).forEach((n) => n?.disconnect());
 };
 
-export const webaudioOutputTrigger = (t, hap, ct, cps) => webaudioOutput(hap, t - ct, hap.duration / cps);
+export const webaudioOutputTrigger = (t, hap, ct, cps) => webaudioOutput(hap, t - ct, hap.duration / cps, cps);
 
 Pattern.prototype.webaudio = function () {
   // TODO: refactor (t, hap, ct, cps) to (hap, deadline, duration) ?