diff --git a/iclc2023/slides/src/EventEditor.jsx b/iclc2023/slides/src/EventEditor.jsx
index 45ad97114..bbb31cbec 100644
--- a/iclc2023/slides/src/EventEditor.jsx
+++ b/iclc2023/slides/src/EventEditor.jsx
@@ -28,7 +28,7 @@ function EventEditor({ code: initialCode }) {
               await initAudio;
               json.forEach((value) => {
                 const hap = new Hap(new TimeSpan(0, 1), new TimeSpan(0, 1), value);
-                webaudioOutput(hap, 0.1, 1, 1);
+                webaudioOutput(hap, 0.01, 1, 1);
               });
             } else if (e.key === '.') {
               stop();
diff --git a/iclc2023/slides/src/EventsDemo.jsx b/iclc2023/slides/src/EventsDemo.jsx
index 1bdb4e322..50aa72ccd 100644
--- a/iclc2023/slides/src/EventsDemo.jsx
+++ b/iclc2023/slides/src/EventsDemo.jsx
@@ -1,8 +1,8 @@
 import EventEditor from './EventEditor.jsx';
-import { useState } from 'react';
+import Stepper from './Stepper.jsx';
 
 const snippets = [
-  [`{ "s": "cp" }`, 'Samples'],
+  [`{ "s": "cp", "crush": 4 }`, 'Samples'],
   [`{ "s": "sawtooth", "note": "e3" }`, 'Oscillators'],
   [
     `[
@@ -24,21 +24,15 @@ const snippets = [
 ];
 
 function EventsDemo() {
-  const [step, setStep] = useState(1);
-
   return (
-    <div className="not-prose">
-      {snippets.slice(0, step).map(([code, label], i) => {
-        const isActive = i === step - 1;
-        return (
-          <div key={i} className={`border-l-4 pl-8 border-gray-500 py-4 ${isActive ? 'p-4 border-yellow-500' : ''}`}>
-            <h3 className="pb-4">{label}</h3>
-            <EventEditor code={code} />
-          </div>
-        );
-      })}
-      {step < snippets.length && <button onClick={() => setStep((r) => r + 1)}>next</button>}
-    </div>
+    <Stepper
+      steps={snippets.map(([code, label]) => (
+        <>
+          <h3 className="pb-4">{label}</h3>
+          <EventEditor code={code} />
+        </>
+      ))}
+    />
   );
 }
 
diff --git a/iclc2023/slides/src/Highlight.jsx b/iclc2023/slides/src/Highlight.jsx
index 0e9ac75ec..51415bd31 100644
--- a/iclc2023/slides/src/Highlight.jsx
+++ b/iclc2023/slides/src/Highlight.jsx
@@ -1,12 +1,17 @@
-import SyntaxHighlighter from 'react-syntax-highlighter';
+//import {Prism as SyntaxHighlighter } from 'react-syntax-highlighter';
+//import { atomDark } from 'react-syntax-highlighter/dist/esm/styles/prism';
+//import SyntaxHighlighter from 'react-syntax-highlighter';
 import { atomOneDark } from 'react-syntax-highlighter/dist/esm/styles/hljs';
-
-Object.assign(atomOneDark.hljs, { padding: '10px' });
+import { Light as SyntaxHighlighter } from 'react-syntax-highlighter';
+import js from 'react-syntax-highlighter/dist/esm/languages/hljs/javascript';
+import hs from 'react-syntax-highlighter/dist/esm/languages/hljs/haskell';
+SyntaxHighlighter.registerLanguage('javascript', js);
+SyntaxHighlighter.registerLanguage('haskell', hs);
 
 function Highlight({ code, language }) {
   return (
     <div className="mb-4 text-[32px] leading-10 rounded-xl overflow-hidden">
-      <SyntaxHighlighter language={language} style={atomOneDark}>
+      <SyntaxHighlighter language={language} style={atomOneDark} customStyle={{ padding: '8px 10px' }}>
         {code}
       </SyntaxHighlighter>
     </div>
diff --git a/iclc2023/slides/src/MiniComparison.jsx b/iclc2023/slides/src/MiniComparison.jsx
index 1196681d3..a9d2e5dcb 100644
--- a/iclc2023/slides/src/MiniComparison.jsx
+++ b/iclc2023/slides/src/MiniComparison.jsx
@@ -1,5 +1,5 @@
-import { useState } from 'react';
 import { SlideRepl } from './SlideRepl.jsx';
+import Stepper from './Stepper.jsx';
 
 const snippets = [
   [`sound("bd [hh sd]")`, `sound(seq("bd", ["hh", "sd"]))`, 'Nested Sequences'], //
@@ -11,7 +11,6 @@ const snippets = [
 ];
 
 function MiniComparison() {
-  const [step, setStep] = useState(1);
   return (
     <>
       <h1>
@@ -19,25 +18,21 @@ function MiniComparison() {
         <br />
         <small>External DSL</small>
       </h1>
-      <div className="not-prose">
-        {snippets.slice(0, step).map(([a, b, label], i) => {
-          const isActive = i === step - 1;
-          return (
-            <div key={i} className={`border-l-4 pl-8 border-gray-500 py-4 ${isActive ? 'p-4 border-yellow-500' : ''}`}>
-              <h3 className="pb-4">{label}</h3>
-              <div className="flex space-x-2">
-                <img src="./img/tidalcycles.svg" className={`h-10 mt-2`} />
-                <SlideRepl tune={a} hideHeader />
-              </div>
-              <div className="flex space-x-2">
-                <img src="./img/js.jpg" className={`h-10 mt-2`} />
-                <SlideRepl tune={b} hideHeader />
-              </div>
+      <Stepper
+        steps={snippets.map(([a, b, label]) => (
+          <>
+            <h3 className="pb-4">{label}</h3>
+            <div className="flex space-x-2">
+              <img src="./img/tidalcycles.svg" className={`h-10 mt-2`} />
+              <SlideRepl tune={a} hideHeader />
             </div>
-          );
-        })}
-      </div>
-      {step < snippets.length && <button onClick={() => setStep((r) => r + 1)}>next</button>}
+            <div className="flex space-x-2">
+              <img src="./img/js.jpg" className={`h-10 mt-2`} />
+              <SlideRepl tune={b} hideHeader />
+            </div>
+          </>
+        ))}
+      />
     </>
   );
 }
diff --git a/iclc2023/slides/src/QueryDemo.jsx b/iclc2023/slides/src/QueryDemo.jsx
index 9a55fe0b1..d71178e41 100644
--- a/iclc2023/slides/src/QueryDemo.jsx
+++ b/iclc2023/slides/src/QueryDemo.jsx
@@ -1,22 +1,23 @@
 import { SlideRepl } from './SlideRepl.jsx';
 import Highlight from './Highlight.jsx';
-import { useState } from 'react';
+import Stepper from './Stepper.jsx';
 
 const snippets = [
-  [<SlideRepl tune={`sound("bd [hh sd]").crush(4).log()`} hideHeader />, 'Logging Events'],
+  [<SlideRepl tune={`s("bd [hh sd]").crush(4).log()`} hideHeader />, 'Logging Events'],
   [
     <>
       <Highlight
-        code={`sound("bd [hh sd]").crush(4) // pattern
-.queryArc(0, 1)`}
+        code={`let pattern = s("bd [hh sd]").crush(4);
+let events = pattern.queryArc(0, 1);
+console.log(events.map(e => e.show()))`}
         language="javascript"
       />
       <Highlight
         language="json"
         code={`[
-  "0/1 -> 1/2 | sound:bd", 
-  "1/2 -> 3/4 | sound:hh", 
-  "3/4 -> 1/1 | sound:sd"
+  "0/1 -> 1/2 | s:bd crush:4", 
+  "1/2 -> 3/4 | s:hh crush:4", 
+  "3/4 -> 1/1 | s:sd crush:4"
 ]`}
       />
     </>,
@@ -25,20 +26,15 @@ const snippets = [
 ];
 
 function QueryDemo() {
-  const [step, setStep] = useState(1);
   return (
-    <div className="not-prose">
-      {snippets.slice(0, step).map(([snippet, label], i) => {
-        const isActive = i === step - 1;
-        return (
-          <div key={i} className={`border-l-4 pl-8 border-gray-500 py-4 ${isActive ? 'p-4 border-yellow-500' : ''}`}>
-            <h3 className="pb-4">{label}</h3>
-            {snippet}
-          </div>
-        );
-      })}
-      {step < snippets.length && <button onClick={() => setStep((r) => r + 1)}>next</button>}
-    </div>
+    <Stepper
+      steps={snippets.map(([snippet, label]) => (
+        <>
+          <h3 className="pb-4">{label}</h3>
+          {snippet}
+        </>
+      ))}
+    />
   );
 }
 
diff --git a/iclc2023/slides/src/Slides.jsx b/iclc2023/slides/src/Slides.jsx
index e6794eb96..73d41bd9f 100644
--- a/iclc2023/slides/src/Slides.jsx
+++ b/iclc2023/slides/src/Slides.jsx
@@ -16,7 +16,18 @@ const loadedMDXFiles = await Promise.all(
   }),
 );
 
-const order = ['01', '02-0', '02-1', '02-2', 'mini-comparison', 'patterns-events', 'events-audio', '04'];
+const order = [
+  'cover',
+  'whatIsStrudel',
+  'history',
+  'hs2js',
+  'mini-comparison',
+  'patterns-events',
+  'events-audio',
+  'transpilation',
+  'replflow',
+  'systems',
+];
 
 const slideEntries = order.map((name) => loadedMDXFiles.find(([file]) => file === name));
 
diff --git a/iclc2023/slides/src/Stepper.jsx b/iclc2023/slides/src/Stepper.jsx
new file mode 100644
index 000000000..f3427d602
--- /dev/null
+++ b/iclc2023/slides/src/Stepper.jsx
@@ -0,0 +1,20 @@
+import { useState } from 'react';
+
+function Stepper({ steps }) {
+  const [step, setStep] = useState(1);
+  return (
+    <div className="not-prose">
+      {steps.slice(0, step).map((snippet, i) => {
+        const isActive = i === step - 1;
+        return (
+          <div key={i} className={`border-l-4 pl-8 border-gray-500 py-4 ${isActive ? 'p-4 border-yellow-500' : ''}`}>
+            {snippet}
+          </div>
+        );
+      })}
+      {step < steps.length && <button onClick={() => setStep((r) => r + 1)}>next</button>}
+    </div>
+  );
+}
+
+export default Stepper;
diff --git a/iclc2023/slides/src/SyntaxComparison.jsx b/iclc2023/slides/src/SyntaxComparison.jsx
index 623323d9b..93d7bca59 100644
--- a/iclc2023/slides/src/SyntaxComparison.jsx
+++ b/iclc2023/slides/src/SyntaxComparison.jsx
@@ -1,6 +1,6 @@
-import { useState } from 'react';
 import { SlideRepl } from './SlideRepl.jsx';
 import Highlight from './Highlight.jsx';
+import Stepper from './Stepper.jsx';
 
 const snippets = [
   [`sound "bd ~ [sd cp]"`, [`sound("bd ~ [sd cp]")`], 'Mini Notation'], //
@@ -40,7 +40,6 @@ const snippets = [
 ];
 
 function SyntaxComparison() {
-  const [step, setStep] = useState(1);
   return (
     <>
       <h1>
@@ -48,35 +47,27 @@ function SyntaxComparison() {
         <br />
         <small>Internal DSL / Fluent Interface</small>
       </h1>
-      <div className=" not-prose justify-start items-start">
-        {/* <div className="grid grid-cols-2">
-          <div>Tidal</div>
-          <div>Strudel</div>
-        </div> */}
-        {snippets.slice(0, step).map(([hs, js, label], i) => {
-          const isActive = i === step - 1;
-          return (
-            <div key={i} className={`border-l-4 pl-8 border-gray-500 py-4 ${isActive ? 'p-4 border-yellow-500' : ''}`}>
-              <h3 className="pb-4">{label}</h3>
+      <Stepper
+        steps={snippets.map(([hs, js, label]) => (
+          <>
+            <h3 className="pb-4">{label}</h3>
+            <div>
+              <div className="flex space-x-4">
+                <img src="./img/haskell.png" className="h-10 mt-2" />
+                <Highlight language="haskell" code={hs} />
+              </div>
               <div>
-                <div className="flex space-x-4">
-                  <img src="./img/haskell.png" className="h-10 mt-2" />
-                  <Highlight language="haskell" code={hs} />
-                </div>
-                <div>
-                  {js.map((c, j) => (
-                    <div className="flex space-x-4" key={j}>
-                      <img src="./img/js.jpg" className={`h-10 mt-2`} />
-                      <SlideRepl tune={c} hideHeader />
-                    </div>
-                  ))}
-                </div>
+                {js.map((c, j) => (
+                  <div className="flex space-x-4" key={j}>
+                    <img src="./img/js.jpg" className={`h-10 mt-2`} />
+                    <SlideRepl tune={c} hideHeader />
+                  </div>
+                ))}
               </div>
             </div>
-          );
-        })}
-      </div>
-      {step < snippets.length && <button onClick={() => setStep((r) => r + 1)}>next</button>}
+          </>
+        ))}
+      />
     </>
   );
 }
diff --git a/iclc2023/slides/src/TranspilationDemo.jsx b/iclc2023/slides/src/TranspilationDemo.jsx
new file mode 100644
index 000000000..36ce41c28
--- /dev/null
+++ b/iclc2023/slides/src/TranspilationDemo.jsx
@@ -0,0 +1,91 @@
+import { useState, useCallback } from 'react';
+import { atomone } from '@uiw/codemirror-themes-all';
+import { CodeMirror, flash, useKeydown } from '@strudel.cycles/react';
+import { transpiler } from '@strudel.cycles/transpiler';
+import Highlight from './Highlight';
+import Stepper from './Stepper';
+import escodegen from 'escodegen';
+
+function getTranspiled(code) {
+  return transpiler(code, {
+    addReturn: false,
+    codegenOptions: {
+      format: escodegen.FORMAT_MINIFY,
+    },
+  });
+}
+
+function TranspilationEditor({ code: initialCode }) {
+  const [code, setCode] = useState(initialCode);
+  const [transpiled, setTranspiled] = useState(getTranspiled(initialCode));
+  const [view, setView] = useState();
+  useKeydown(
+    useCallback(
+      async (e) => {
+        if (view?.hasFocus) {
+          if (e.ctrlKey || e.altKey) {
+            if (e.code === 'Enter') {
+              /* if (getAudioContext().state !== 'running') {
+              alert('please click play to initialize the audio. you can use shortcuts after that!');
+              return;
+            } */
+              e.preventDefault();
+              flash(view);
+              const t = getTranspiled(code);
+              setTranspiled(t);
+              console.log('transpiled', t);
+            } else if (e.key === '.') {
+              stop();
+              e.preventDefault();
+            }
+          }
+        }
+      },
+      [code, view],
+    ),
+  );
+  return (
+    <>
+      <CodeMirror
+        value={code}
+        onChange={(v) => {
+          setCode(v);
+        }}
+        theme={atomone}
+        onViewChanged={(v) => setView(v)}
+        fontSize={32}
+      />
+      <span>
+        ⬇️ transpiles to ⬇️ <small>via acorn / estree-walker / escodegen</small>
+      </span>
+      <Highlight language="javascript" code={transpiled} />
+    </>
+  );
+}
+
+function TranspilationDemo() {
+  return (
+    <div className="not-prose space-y-8">
+      <Stepper
+        steps={[
+          <TranspilationEditor code={`"bd [hh sd]".s()`} />,
+          <>
+            <span>⬇️ calls ⬇️</span> <small>via peggy</small>
+            <Highlight
+              code={`seq(
+  reify('bd').withLocation([1,1,1], [1,4,4]),
+  seq(
+    reify('hh').withLocation([1,5,5], [1,8,8]),
+    reify('sd').withLocation([1,8,8], [1,10,10]),
+  )
+).withMiniLocation([1,0,0],[1,12,12]).s()`}
+            />
+            <span>➡️ location can be used for highlighting</span>
+          </>,
+        ]}
+      />
+    </div>
+  );
+}
+
+export default TranspilationDemo;
diff --git a/iclc2023/slides/src/slides/01.mdx b/iclc2023/slides/src/slides/cover.mdx
similarity index 100%
rename from iclc2023/slides/src/slides/01.mdx
rename to iclc2023/slides/src/slides/cover.mdx
diff --git a/iclc2023/slides/src/slides/02-1.mdx b/iclc2023/slides/src/slides/history.mdx
similarity index 100%
rename from iclc2023/slides/src/slides/02-1.mdx
rename to iclc2023/slides/src/slides/history.mdx
diff --git a/iclc2023/slides/src/slides/02-2.mdx b/iclc2023/slides/src/slides/hs2js.mdx
similarity index 100%
rename from iclc2023/slides/src/slides/02-2.mdx
rename to iclc2023/slides/src/slides/hs2js.mdx
diff --git a/iclc2023/slides/src/slides/04.mdx b/iclc2023/slides/src/slides/replflow.mdx
similarity index 100%
rename from iclc2023/slides/src/slides/04.mdx
rename to iclc2023/slides/src/slides/replflow.mdx
diff --git a/iclc2023/slides/src/slides/02-3.mdx b/iclc2023/slides/src/slides/systems.mdx
similarity index 100%
rename from iclc2023/slides/src/slides/02-3.mdx
rename to iclc2023/slides/src/slides/systems.mdx
diff --git a/iclc2023/slides/src/slides/transpilation.mdx b/iclc2023/slides/src/slides/transpilation.mdx
new file mode 100644
index 000000000..3e101aefa
--- /dev/null
+++ b/iclc2023/slides/src/slides/transpilation.mdx
@@ -0,0 +1,5 @@
+import TranspilationDemo from '../TranspilationDemo';
+
+# Transpilation
+
+<TranspilationDemo />
diff --git a/iclc2023/slides/src/slides/02-0.mdx b/iclc2023/slides/src/slides/whatIsStrudel.mdx
similarity index 100%
rename from iclc2023/slides/src/slides/02-0.mdx
rename to iclc2023/slides/src/slides/whatIsStrudel.mdx
diff --git a/packages/transpiler/transpiler.mjs b/packages/transpiler/transpiler.mjs
index fee9d542e..18f87bd3d 100644
--- a/packages/transpiler/transpiler.mjs
+++ b/packages/transpiler/transpiler.mjs
@@ -4,7 +4,7 @@ import { walk } from 'estree-walker';
 import { isNoteWithOctave } from '@strudel.cycles/core';
 
 export function transpiler(input, options = {}) {
-  const { wrapAsync = false, addReturn = true, simpleLocs = false } = options;
+  const { wrapAsync = false, addReturn = true, simpleLocs = false, codegenOptions = {} } = options;
 
   let ast = parse(input, {
     ecmaVersion: 2022,
@@ -47,7 +47,7 @@ export function transpiler(input, options = {}) {
       argument: expression,
     };
   }
-  const output = escodegen.generate(ast);
+  const output = escodegen.generate(ast, codegenOptions);
   if (wrapAsync) {
     return `(async ()=>{${output}})()`;
   }