diff --git a/src/components/ava/header.tsx b/src/components/ava/header.tsx
index 29c3c60..1340fcd 100755
--- a/src/components/ava/header.tsx
+++ b/src/components/ava/header.tsx
@@ -1,19 +1,18 @@
 // OVE — sticky app header: logo, audio source controls (segmented), the
-// demo-track chip, theme tick switch, BPM readout, and the beat indicator +
-// "Set Beat" button side by side (hard requirement: that pairing is always
-// visible in the header).
+// demo-track chip, What's New!, theme tick switch, BPM readout and the beat
+// indicator. (v7.6.1: the Set Beat button moved out — tap-tempo lives in the
+// Beat tab, and Space works anywhere.)
 
 'use client'
 
 import { useRef, useSyncExternalStore } from 'react'
-import { AudioWaveform, Disc3, FileAudio, Link2, Mic, Moon, Music2, Square, Sun, Timer } from 'lucide-react'
+import { AudioWaveform, Disc3, FileAudio, Link2, Mic, Moon, Music2, Square, Sun } from 'lucide-react'
 import { useTheme } from 'next-themes'
-import { Button } from '@/components/ui/button'
 import { Switch } from '@/components/ui/switch'
 import { BeatDot } from '@/components/ava/beat-dot'
 import { LinkDialog } from '@/components/ava/link-dialog'
 import { WhatsNew } from '@/components/ava/whats-new-dialog'
-import { tapBeat, useAudioSource } from '@/components/ava/audio-source'
+import { useAudioSource } from '@/components/ava/audio-source'
 import { useAvaStore } from '@/lib/store'
 import { getStoredDarkBase } from '@/lib/theme'
 import { APP_NAME, APP_SHORT } from '@/lib/version'
@@ -41,7 +40,7 @@ function SourceSegmentButton({
       aria-pressed={active}
       title={title}
       className={cn(
-        'flex h-11 items-center gap-1.5 rounded-md px-3 text-xs font-medium transition-colors',
+        'flex h-11 items-center gap-1.5 rounded-md px-3 text-xs font-medium transition-colors max-[400px]:gap-0 max-[400px]:px-2.5',
         active
           ? 'glow-segment bg-emerald-400/15 text-emerald-300'
           : tone === 'stop'
@@ -49,8 +48,11 @@ function SourceSegmentButton({
             : 'text-zinc-400 hover:bg-zinc-800 hover:text-zinc-100',
       )}
     >
-      <Icon className="size-3.5" />
-      {label}
+      <Icon className="size-3.5 shrink-0" />
+      {/* under 400px the five-button segment row exceeds the viewport — the
+          labels collapse to screen-reader-only (icon + tooltip carries the
+          meaning, same shortening pattern as What's New! → New) */}
+      <span className="max-[400px]:sr-only">{label}</span>
     </button>
   )
 }
@@ -192,21 +194,12 @@ export function AppHeader() {
           <SourceControls />
         </div>
 
-        {/* what's new + theme switch + BPM readout + beat indicator + Set Beat — always visible */}
+        {/* what's new + theme switch + BPM readout + beat indicator — always visible */}
         <div className="order-2 ml-auto flex items-center gap-2.5 md:order-3 sm:gap-3">
           <WhatsNew />
           <ThemeToggle />
           <BpmReadout />
           <BeatDot size={44} />
-          <Button
-            onClick={tapBeat}
-            className="h-11 gap-1.5 bg-emerald-400 px-3 font-semibold text-emerald-950 hover:bg-emerald-300 sm:px-4"
-            title="Tap to set the tempo (or press Space)"
-          >
-            <Timer className="size-4" />
-            <span className="hidden sm:inline">Set Beat</span>
-            <span className="sm:hidden">Beat</span>
-          </Button>
         </div>
       </div>
 
diff --git a/src/lib/release-notes.ts b/src/lib/release-notes.ts
index 8c06301..ea91b2f 100644
--- a/src/lib/release-notes.ts
+++ b/src/lib/release-notes.ts
@@ -33,6 +33,12 @@ export interface ReleaseNote {
 }
 
 export const RELEASE_NOTES: ReleaseNote[] = [
+  {
+    version: '7.6.1',
+    changes: [
+      { kind: 'removed', text: 'The “Set Beat” button from the header — tap-tempo lives in the Beat tab (and Space still works anywhere). The beat indicator stays.' },
+    ],
+  },
   {
     version: '7.6',
     name: 'What’s New!',
diff --git a/src/lib/version.ts b/src/lib/version.ts
index 9cec5c8..b7637b3 100755
--- a/src/lib/version.ts
+++ b/src/lib/version.ts
@@ -12,6 +12,9 @@
 // warns in the console when the two drift apart.
 //
 // History:
+//   7.6.1 — header declutter: the Set Beat button is gone from the header
+//           (tap-tempo lives in the Beat tab, and the Space shortcut works
+//           anywhere — both unchanged). The beat indicator dot stays.
 //   7.6 — "What's New!" dialog: a Sparkles button in the header (left of
 //           the theme switch) opens the visitor-facing changelog — every
 //           release from v4.0 on, newest first, each with one-line Added /
@@ -220,4 +223,4 @@
 
 export const APP_NAME = 'Open Visualization Engine'
 export const APP_SHORT = 'OVE'
-export const APP_VERSION = '7.6'
+export const APP_VERSION = '7.6.1'