diff --git a/backend/melodies/models.py b/backend/melodies/models.py
index 20ef422..9364cbc 100644
--- a/backend/melodies/models.py
+++ b/backend/melodies/models.py
@@ -28,6 +28,7 @@ class MelodyInfo(BaseModel):
     color: str = ""
     isTrueRing: bool = False
     previewURL: str = ""
+    archetype_csv: Optional[str] = None
 
 
 class MelodyAttributes(BaseModel):
diff --git a/frontend/src/melodies/MelodyDetail.jsx b/frontend/src/melodies/MelodyDetail.jsx
index 7211742..46c89fa 100644
--- a/frontend/src/melodies/MelodyDetail.jsx
+++ b/frontend/src/melodies/MelodyDetail.jsx
@@ -5,6 +5,25 @@ import { useAuth } from "../auth/AuthContext";
 import ConfirmDialog from "../components/ConfirmDialog";
 import SpeedCalculatorModal from "./SpeedCalculatorModal";
 import PlaybackModal from "./PlaybackModal";
+
+function fallbackCopy(text, onSuccess) {
+  const ta = document.createElement("textarea");
+  ta.value = text;
+  ta.style.cssText = "position:fixed;top:0;left:0;opacity:0";
+  document.body.appendChild(ta);
+  ta.focus();
+  ta.select();
+  try { document.execCommand("copy"); onSuccess?.(); } catch (_) {}
+  document.body.removeChild(ta);
+}
+
+function copyText(text, onSuccess) {
+  if (navigator.clipboard) {
+    navigator.clipboard.writeText(text).then(onSuccess).catch(() => fallbackCopy(text, onSuccess));
+  } else {
+    fallbackCopy(text, onSuccess);
+  }
+}
 import {
   getLocalizedValue,
   getLanguageName,
@@ -415,12 +434,7 @@ export default function MelodyDetail() {
               </p>
             </div>
             <button
-              onClick={() => {
-                navigator.clipboard.writeText(builtMelody.progmem_code).then(() => {
-                  setCodeCopied(true);
-                  setTimeout(() => setCodeCopied(false), 2000);
-                });
-              }}
+              onClick={() => copyText(builtMelody.progmem_code, () => { setCodeCopied(true); setTimeout(() => setCodeCopied(false), 2000); })}
               className="px-3 py-1.5 text-xs rounded transition-colors"
               style={{
                 backgroundColor: codeCopied ? "var(--success-bg)" : "var(--bg-card-hover)",
@@ -453,6 +467,7 @@ export default function MelodyDetail() {
         melody={melody}
         builtMelody={builtMelody}
         files={files}
+        archetypeCsv={melody?.information?.archetype_csv || null}
         onClose={() => setShowPlayback(false)}
       />
 
@@ -460,6 +475,7 @@ export default function MelodyDetail() {
         open={showSpeedCalc}
         melody={melody}
         builtMelody={builtMelody}
+        archetypeCsv={melody?.information?.archetype_csv || null}
         onClose={() => setShowSpeedCalc(false)}
         onSaved={() => {
           setShowSpeedCalc(false);
diff --git a/frontend/src/melodies/MelodyForm.jsx b/frontend/src/melodies/MelodyForm.jsx
index 6c887ea..e7ae59e 100644
--- a/frontend/src/melodies/MelodyForm.jsx
+++ b/frontend/src/melodies/MelodyForm.jsx
@@ -638,12 +638,14 @@ export default function MelodyForm() {
             open={showSpeedCalc}
             melody={{ id, information, default_settings: settings, type, url, uid, pid }}
             builtMelody={builtMelody}
+            archetypeCsv={information.archetype_csv || null}
             onClose={() => setShowSpeedCalc(false)}
             onSaved={() => { setShowSpeedCalc(false); loadMelody(); }}
           />
           <SelectBuiltMelodyModal
             open={showSelectBuilt}
             melodyId={id}
+            currentMelody={{ information, default_settings: settings, type, url, uid, pid }}
             onClose={() => setShowSelectBuilt(false)}
             onSuccess={(archetype) => {
               setShowSelectBuilt(false);
@@ -655,6 +657,7 @@ export default function MelodyForm() {
           <BuildOnTheFlyModal
             open={showBuildOnTheFly}
             melodyId={id}
+            currentMelody={{ information, default_settings: settings, type, url, uid, pid }}
             defaultName={getLocalizedValue(information.name, "en", "") || getLocalizedValue(information.name, editLang, "")}
             defaultPid={pid}
             onClose={() => setShowBuildOnTheFly(false)}
diff --git a/frontend/src/melodies/PlaybackModal.jsx b/frontend/src/melodies/PlaybackModal.jsx
index f01fc0c..3e6b8e7 100644
--- a/frontend/src/melodies/PlaybackModal.jsx
+++ b/frontend/src/melodies/PlaybackModal.jsx
@@ -42,6 +42,22 @@ function getActiveBells(stepValue) {
   return bells;
 }
 
+function parseBellNotation(notation) {
+  notation = notation.trim();
+  if (notation === "0" || !notation) return 0;
+  let value = 0;
+  for (const part of notation.split("+")) {
+    const n = parseInt(part.trim(), 10);
+    if (!isNaN(n) && n >= 1 && n <= 16) value |= 1 << (n - 1);
+  }
+  return value;
+}
+
+function parseStepsString(stepsStr) {
+  if (!stepsStr || !stepsStr.trim()) return [];
+  return stepsStr.trim().split(",").map((s) => parseBellNotation(s));
+}
+
 async function decodeBsmBinary(url) {
   const token = localStorage.getItem("access_token");
   const res = await fetch(url, {
@@ -81,7 +97,7 @@ const BEAT_DURATION_MS = 80; // fixed tone length for playback
 const mutedStyle = { color: "var(--text-muted)" };
 const labelStyle = { color: "var(--text-secondary)" };
 
-export default function PlaybackModal({ open, melody, builtMelody, files, onClose }) {
+export default function PlaybackModal({ open, melody, builtMelody, files, archetypeCsv, onClose }) {
   const info = melody?.information || {};
   const minSpeed = info.minSpeed || null;
   const maxSpeed = info.maxSpeed || null;
@@ -115,7 +131,7 @@ export default function PlaybackModal({ open, melody, builtMelody, files, onClos
     setCurrentStep(-1);
   }, []);
 
-  // Load binary on open
+  // Load steps on open — prefer archetype_csv, fall back to binary
   useEffect(() => {
     if (!open) {
       stopPlayback();
@@ -126,14 +142,23 @@ export default function PlaybackModal({ open, melody, builtMelody, files, onClos
       return;
     }
 
-    // builtMelody.binary_url is a relative path needing /api prefix;
-    // files.binary_url from the /files endpoint is already a full URL path.
+    // Prefer CSV from archetype (no network request needed)
+    const csv = archetypeCsv || info.archetype_csv || null;
+    if (csv) {
+      const parsed = parseStepsString(csv);
+      setSteps(parsed);
+      stepsRef.current = parsed;
+      setLoadError("");
+      return;
+    }
+
+    // Fall back to binary fetch
     const binaryUrl = builtMelody?.binary_url
       ? `/api${builtMelody.binary_url}`
       : files?.binary_url || null;
 
     if (!binaryUrl) {
-      setLoadError("No binary file available for this melody.");
+      setLoadError("No binary or archetype data available for this melody.");
       return;
     }
 
diff --git a/frontend/src/melodies/SpeedCalculatorModal.jsx b/frontend/src/melodies/SpeedCalculatorModal.jsx
index 21970fd..6e98e0a 100644
--- a/frontend/src/melodies/SpeedCalculatorModal.jsx
+++ b/frontend/src/melodies/SpeedCalculatorModal.jsx
@@ -115,7 +115,7 @@ const DELAY_MAX = 3000;
 function delayToSlider(ms) { return DELAY_MIN + DELAY_MAX - ms; }
 function sliderToDelay(val) { return DELAY_MIN + DELAY_MAX - val; }
 
-export default function SpeedCalculatorModal({ open, melody, builtMelody, onClose, onSaved }) {
+export default function SpeedCalculatorModal({ open, melody, builtMelody, archetypeCsv, onClose, onSaved }) {
   const info = melody?.information || {};
 
   // Raw steps input
@@ -164,19 +164,28 @@ export default function SpeedCalculatorModal({ open, melody, builtMelody, onClos
   const maxWarning = capturedMax !== null && capturedMax < 100;
   const orderWarning = capturedMax !== null && capturedNormal !== null && capturedNormal < capturedMax;
 
-  // Reset on open
+  // Reset on open — auto-load archetype CSV if available
   useEffect(() => {
     if (open) {
       setCapturedMax(info.maxSpeed > 0 ? info.maxSpeed : null);
       setCapturedNormal(null);
-      setStepsInput("");
-      setSteps([]);
       setBinaryLoadError("");
       setCurrentStep(-1);
       setPlaying(false);
       setPaused(false);
       setSaveError("");
       setSaveSuccess(false);
+
+      const csv = archetypeCsv || info.archetype_csv || null;
+      if (csv) {
+        const parsed = parseStepsString(csv);
+        setStepsInput(csv);
+        setSteps(parsed);
+        stepsRef.current = parsed;
+      } else {
+        setStepsInput("");
+        setSteps([]);
+      }
     }
   }, [open]); // eslint-disable-line react-hooks/exhaustive-deps
 
diff --git a/frontend/src/melodies/builder/BuildOnTheFlyModal.jsx b/frontend/src/melodies/builder/BuildOnTheFlyModal.jsx
index 2a95071..da5a924 100644
--- a/frontend/src/melodies/builder/BuildOnTheFlyModal.jsx
+++ b/frontend/src/melodies/builder/BuildOnTheFlyModal.jsx
@@ -10,7 +10,20 @@ function countSteps(stepsStr) {
   return stepsStr.trim().split(",").length;
 }
 
-export default function BuildOnTheFlyModal({ open, melodyId, defaultName, defaultPid, onClose, onSuccess }) {
+function computeStepsAndNotes(stepsStr) {
+  if (!stepsStr || !stepsStr.trim()) return { steps: 0, totalNotes: 0 };
+  const tokens = stepsStr.trim().split(",");
+  const bellSet = new Set();
+  for (const token of tokens) {
+    for (const part of token.split("+")) {
+      const n = parseInt(part.trim(), 10);
+      if (!isNaN(n) && n >= 1 && n <= 16) bellSet.add(n);
+    }
+  }
+  return { steps: tokens.length, totalNotes: bellSet.size || 1 };
+}
+
+export default function BuildOnTheFlyModal({ open, melodyId, currentMelody, defaultName, defaultPid, onClose, onSuccess }) {
   const [name, setName] = useState(defaultName || "");
   const [pid, setPid] = useState(defaultPid || "");
   const [steps, setSteps] = useState("");
@@ -57,8 +70,29 @@ export default function BuildOnTheFlyModal({ open, melodyId, defaultName, defaul
       setStatusMsg("Linking to melody...");
       await api.post(`/builder/melodies/${builtId}/assign?firestore_melody_id=${melodyId}`);
 
+      // Step 5: Update the melody's information with archetype_csv, steps, and totalNotes
+      setStatusMsg("Saving archetype data...");
+      const csv = steps.trim();
+      const { steps: stepCount, totalNotes } = computeStepsAndNotes(csv);
+      if (currentMelody && csv) {
+        const existingInfo = currentMelody.information || {};
+        await api.put(`/melodies/${melodyId}`, {
+          information: {
+            ...existingInfo,
+            archetype_csv: csv,
+            steps: stepCount,
+            totalNotes,
+          },
+          default_settings: currentMelody.default_settings,
+          type: currentMelody.type,
+          url: currentMelody.url,
+          uid: currentMelody.uid,
+          pid: currentMelody.pid,
+        });
+      }
+
       setStatusMsg("Done!");
-      onSuccess({ name: name.trim(), pid: pid.trim() });
+      onSuccess({ name: name.trim(), pid: pid.trim(), steps: stepCount, totalNotes, archetype_csv: csv });
     } catch (err) {
       setError(err.message);
       setStatusMsg("");
diff --git a/frontend/src/melodies/builder/BuilderForm.jsx b/frontend/src/melodies/builder/BuilderForm.jsx
index 8714c9d..973f63e 100644
--- a/frontend/src/melodies/builder/BuilderForm.jsx
+++ b/frontend/src/melodies/builder/BuilderForm.jsx
@@ -7,6 +7,24 @@ const labelStyle = { color: "var(--text-secondary)" };
 const mutedStyle = { color: "var(--text-muted)" };
 const inputClass = "w-full px-3 py-2 rounded-md text-sm border";
 
+function copyText(text, onSuccess) {
+  const fallback = () => {
+    const ta = document.createElement("textarea");
+    ta.value = text;
+    ta.style.cssText = "position:fixed;top:0;left:0;opacity:0";
+    document.body.appendChild(ta);
+    ta.focus();
+    ta.select();
+    try { document.execCommand("copy"); onSuccess?.(); } catch (_) {}
+    document.body.removeChild(ta);
+  };
+  if (navigator.clipboard) {
+    navigator.clipboard.writeText(text).then(onSuccess).catch(fallback);
+  } else {
+    fallback();
+  }
+}
+
 function countSteps(stepsStr) {
   if (!stepsStr || !stepsStr.trim()) return 0;
   return stepsStr.trim().split(",").length;
@@ -128,10 +146,7 @@ export default function BuilderForm() {
 
   const handleCopy = () => {
     if (!progmemCode) return;
-    navigator.clipboard.writeText(progmemCode).then(() => {
-      setCopied(true);
-      setTimeout(() => setCopied(false), 2000);
-    });
+    copyText(progmemCode, () => { setCopied(true); setTimeout(() => setCopied(false), 2000); });
   };
 
   if (loading) {
diff --git a/frontend/src/melodies/builder/BuilderList.jsx b/frontend/src/melodies/builder/BuilderList.jsx
index ac8dbcc..db93361 100644
--- a/frontend/src/melodies/builder/BuilderList.jsx
+++ b/frontend/src/melodies/builder/BuilderList.jsx
@@ -3,6 +3,25 @@ import { useNavigate } from "react-router-dom";
 import api from "../../api/client";
 import ConfirmDialog from "../../components/ConfirmDialog";
 
+function fallbackCopy(text, onSuccess) {
+  const ta = document.createElement("textarea");
+  ta.value = text;
+  ta.style.cssText = "position:fixed;top:0;left:0;opacity:0";
+  document.body.appendChild(ta);
+  ta.focus();
+  ta.select();
+  try { document.execCommand("copy"); onSuccess?.(); } catch (_) {}
+  document.body.removeChild(ta);
+}
+
+function copyText(text, onSuccess) {
+  if (navigator.clipboard) {
+    navigator.clipboard.writeText(text).then(onSuccess).catch(() => fallbackCopy(text, onSuccess));
+  } else {
+    fallbackCopy(text, onSuccess);
+  }
+}
+
 function CodeSnippetModal({ melody, onClose }) {
   const [copied, setCopied] = useState(false);
   if (!melody) return null;
@@ -23,12 +42,7 @@ function CodeSnippetModal({ melody, onClose }) {
           </div>
           <div className="flex items-center gap-3">
             <button
-              onClick={() => {
-                navigator.clipboard.writeText(melody.progmem_code).then(() => {
-                  setCopied(true);
-                  setTimeout(() => setCopied(false), 2000);
-                });
-              }}
+              onClick={() => copyText(melody.progmem_code, () => { setCopied(true); setTimeout(() => setCopied(false), 2000); })}
               className="px-3 py-1.5 text-xs rounded transition-colors"
               style={{
                 backgroundColor: copied ? "var(--success-bg)" : "var(--bg-card-hover)",
diff --git a/frontend/src/melodies/builder/SelectBuiltMelodyModal.jsx b/frontend/src/melodies/builder/SelectBuiltMelodyModal.jsx
index 11f6225..e8ad4c7 100644
--- a/frontend/src/melodies/builder/SelectBuiltMelodyModal.jsx
+++ b/frontend/src/melodies/builder/SelectBuiltMelodyModal.jsx
@@ -1,7 +1,20 @@
 import { useState, useEffect } from "react";
 import api from "../../api/client";
 
-export default function SelectBuiltMelodyModal({ open, melodyId, onClose, onSuccess }) {
+function computeStepsAndNotes(stepsStr) {
+  if (!stepsStr || !stepsStr.trim()) return { steps: 0, totalNotes: 0 };
+  const tokens = stepsStr.trim().split(",");
+  const bellSet = new Set();
+  for (const token of tokens) {
+    for (const part of token.split("+")) {
+      const n = parseInt(part.trim(), 10);
+      if (!isNaN(n) && n >= 1 && n <= 16) bellSet.add(n);
+    }
+  }
+  return { steps: tokens.length, totalNotes: bellSet.size || 1 };
+}
+
+export default function SelectBuiltMelodyModal({ open, melodyId, currentMelody, onClose, onSuccess }) {
   const [melodies, setMelodies] = useState([]);
   const [loading, setLoading] = useState(false);
   const [assigning, setAssigning] = useState(null); // id of the one being assigned
@@ -44,7 +57,27 @@ export default function SelectBuiltMelodyModal({ open, melodyId, onClose, onSucc
       // 3. Mark this built melody as assigned to this Firestore melody
       await api.post(`/builder/melodies/${builtMelody.id}/assign?firestore_melody_id=${melodyId}`);
 
-      onSuccess({ name: builtMelody.name, pid: builtMelody.pid });
+      // 4. Update the melody's information with archetype_csv, steps, and totalNotes
+      const csv = builtMelody.steps || "";
+      const { steps, totalNotes } = computeStepsAndNotes(csv);
+      if (currentMelody && csv) {
+        const existingInfo = currentMelody.information || {};
+        await api.put(`/melodies/${melodyId}`, {
+          information: {
+            ...existingInfo,
+            archetype_csv: csv,
+            steps,
+            totalNotes,
+          },
+          default_settings: currentMelody.default_settings,
+          type: currentMelody.type,
+          url: currentMelody.url,
+          uid: currentMelody.uid,
+          pid: currentMelody.pid,
+        });
+      }
+
+      onSuccess({ name: builtMelody.name, pid: builtMelody.pid, steps, totalNotes, archetype_csv: csv });
     } catch (err) {
       setError(err.message);
     } finally {