diff --git a/src/App.jsx b/src/App.jsx
index bd614e1..fc514d1 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -32,6 +32,7 @@ const API = {
   getPreset:     (bank, program)                 => api("GET",  `/api/presets/${bank}/${program}`),
   activatePreset:(bank, program)                 => api("POST", `/api/presets/${bank}/${program}/activate`),
   savePreset:    (bank, program, name, tags)     => api("PUT",  "/api/presets", { bank, program, name, tags }),
+  setAudioProfile:(rate, period)                 => api("POST", "/api/audio/profile", { rate: parseInt(rate), period: parseInt(period) }),
   searchModels:  (q)                             => api("GET",  `/api/tonehub/search?q=${encodeURIComponent(q)}`),
   searchIrs:     (q)                             => api("GET",  `/api/tonehub/search/irs?q=${encodeURIComponent(q)}`),
   installModel:  (url, name)                     => api("POST", "/api/models/tonedownload/install", { download_url: url, name }),
@@ -587,7 +588,7 @@ export default function App(){
     API.listPresets().then(data=>{
       if(data?.banks){
         const all=[];
-        data.banks.forEach(b=>{(b.presets||[]).forEach((p,i)=>{if(p)all.push({num:i+1,bank:b.number,name:p.name,chain:p.chain});});});
+        data.banks.forEach(b=>{(b.presets||[]).forEach((p,i)=>{if(p)all.push({num:i+1,bank:b.number+1,name:p.name,chain:p.chain});});});
         if(all.length>0)setPresets(all);
       }
     }).catch(()=>{});
@@ -1010,6 +1011,7 @@ export default function App(){
         <GlobalSettings
           onClose={()=>setSettingsView(null)}
           onMasterVolume={(v)=>API.masterVolume(v).catch(()=>{})}
+          onAudioProfile={(rate, period)=>API.setAudioProfile(rate, period).catch(()=>{})}
         />
       )}
 
diff --git a/src/GlobalSettings.jsx b/src/GlobalSettings.jsx
index ff3c84c..a1fb152 100644
--- a/src/GlobalSettings.jsx
+++ b/src/GlobalSettings.jsx
@@ -10,6 +10,22 @@ const T = {
 const SETTINGS = {
   "Audio": [
     { key: "master_volume", label: "Master Volume", type: "slider", min: 0, max: 100, def: 72, unit: "%", icon: "🔊" },
+    { key: "sample_rate",  label: "Sample Rate",   type: "select", def: "48000",
+      options: [
+        { value: "22050", label: "22.05 kHz" },
+        { value: "44100", label: "44.1 kHz" },
+        { value: "48000", label: "48 kHz" },
+        { value: "88200", label: "88.2 kHz" },
+        { value: "96000", label: "96 kHz" },
+      ], icon: "📊" },
+    { key: "buffer_size",  label: "Buffer Size",   type: "select", def: "512",
+      options: [
+        { value: "64",  label: "64 (1.3ms)" },
+        { value: "128", label: "128 (2.7ms)" },
+        { value: "256", label: "256 (5.3ms)" },
+        { value: "512", label: "512 (10.6ms)" },
+        { value: "1024",label: "1024 (21.3ms)" },
+      ], icon: "📦" },
     { key: "input_pad",    label: "Input Pad",     type: "select", def: "off",
       options: [
         { value: "off", label: "Off (0 dB)" },
@@ -275,7 +291,7 @@ function BpmWidget({ label, value, onChange }) {
 }
 
 // ── Global Settings ──
-export default function GlobalSettings({ onClose, onMasterVolume }) {
+export default function GlobalSettings({ onClose, onMasterVolume, onAudioProfile }) {
   const [values, setValues] = useState(() => {
     const init = {};
     for (const group of Object.values(SETTINGS)) {
@@ -294,7 +310,17 @@ export default function GlobalSettings({ onClose, onMasterVolume }) {
     if (key === "master_volume") {
       onMasterVolume?.(val);
     }
-  }, [onMasterVolume]);
+    // Fire external callback for audio profile changes
+    if (key === "sample_rate" || key === "buffer_size") {
+      // Get the latest values — use the new val for the changed key
+      setValues(prev => {
+        const rate = key === "sample_rate" ? val : (prev.sample_rate || "48000");
+        const period = key === "buffer_size" ? val : (prev.buffer_size || "512");
+        onAudioProfile?.(parseInt(rate), parseInt(period));
+        return prev;
+      });
+    }
+  }, [onMasterVolume, onAudioProfile]);
 
   return (
     <div style={{