diff --git a/index.html b/index.html
index 754b491..7d6d915 100644
--- a/index.html
+++ b/index.html
@@ -44,6 +44,7 @@
 				<li><a href="standalone/imu-1/3d.html">3D view using GravitySensor</a></li>
 				<li><a href="standalone/delaunay.html">Delaunay dataset</a></li>
 				<li><a href="standalone/delaunay-edge-relax.html">Delaunay dataset + Edge relaxation (Currently broken)</a></li>
+				<li><a href="standalone/fluidsynth-reverb.html">Reverb configurator for FluidSynth CLI UI</a></li>
 			</ul>
 		</li>
 
diff --git a/standalone/fluidsynth-reverb.html b/standalone/fluidsynth-reverb.html
new file mode 100644
index 0000000..f4adaf0
--- /dev/null
+++ b/standalone/fluidsynth-reverb.html
@@ -0,0 +1,249 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>FluidSynth Reverb</title>
+  <style>
+    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
+
+    body {
+      font-family: 'Courier New', Courier, monospace;
+      background: #111;
+      color: #ccc;
+      min-height: 100vh;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      padding: 2rem;
+    }
+
+    .card {
+      background: #1a1a1a;
+      border: 1px solid #2a2a2a;
+      border-radius: 6px;
+      padding: 2rem;
+      width: 100%;
+      max-width: 520px;
+    }
+
+    h1 {
+      font-size: 13px;
+      font-weight: normal;
+      color: #666;
+      letter-spacing: 0.1em;
+      text-transform: uppercase;
+      margin-bottom: 1.5rem;
+    }
+
+    .preset-row {
+      display: flex;
+      gap: 6px;
+      flex-wrap: wrap;
+      margin-bottom: 1.75rem;
+    }
+
+    .preset-row button {
+      font-family: inherit;
+      font-size: 11px;
+      padding: 4px 10px;
+      background: transparent;
+      border: 1px solid #333;
+      border-radius: 3px;
+      color: #888;
+      cursor: pointer;
+      letter-spacing: 0.05em;
+      transition: border-color 0.15s, color 0.15s;
+    }
+
+    .preset-row button:hover {
+      border-color: #555;
+      color: #bbb;
+    }
+
+    .row {
+      display: flex;
+      align-items: center;
+      gap: 12px;
+      margin-bottom: 1rem;
+    }
+
+    .label {
+      font-size: 12px;
+      color: #555;
+      width: 80px;
+      flex-shrink: 0;
+      letter-spacing: 0.04em;
+    }
+
+    input[type=range] {
+      flex: 1;
+      -webkit-appearance: none;
+      height: 1px;
+      background: #333;
+      outline: none;
+      cursor: pointer;
+    }
+
+    input[type=range]::-webkit-slider-thumb {
+      -webkit-appearance: none;
+      width: 12px;
+      height: 12px;
+      background: #7ec8e3;
+      border-radius: 50%;
+    }
+
+    input[type=range]::-moz-range-thumb {
+      width: 12px;
+      height: 12px;
+      background: #7ec8e3;
+      border: none;
+      border-radius: 50%;
+    }
+
+    .val {
+      font-size: 12px;
+      color: #7ec8e3;
+      width: 38px;
+      text-align: right;
+      flex-shrink: 0;
+    }
+
+    .divider {
+      border: none;
+      border-top: 1px solid #222;
+      margin: 1.5rem 0;
+    }
+
+    .cmd-label {
+      font-size: 10px;
+      color: #444;
+      letter-spacing: 0.1em;
+      text-transform: uppercase;
+      margin-bottom: 8px;
+    }
+
+    .cmd-box {
+      background: #111;
+      border: 1px solid #222;
+      border-radius: 4px;
+      padding: 14px 16px;
+      font-size: 12px;
+      color: #7ec8e3;
+      line-height: 1.9;
+      white-space: pre;
+    }
+
+    .copy-btn {
+      margin-top: 10px;
+      font-family: inherit;
+      font-size: 11px;
+      padding: 5px 14px;
+      background: transparent;
+      border: 1px solid #333;
+      border-radius: 3px;
+      color: #666;
+      cursor: pointer;
+      letter-spacing: 0.05em;
+      transition: border-color 0.15s, color 0.15s;
+    }
+
+    .copy-btn:hover {
+      border-color: #555;
+      color: #aaa;
+    }
+
+    .footer {
+      margin-top: 1.5rem;
+      font-size: 10px;
+      color: #333;
+      letter-spacing: 0.06em;
+      text-align: right;
+    }
+  </style>
+</head>
+<body>
+  <div class="card">
+    <h1>FluidSynth &mdash; Reverb</h1>
+
+    <div class="preset-row">
+      <button onclick="applyPreset(0.85,0.35,85,0.55)">Hall</button>
+      <button onclick="applyPreset(0.95,0.15,100,0.7)">Cathedral</button>
+      <button onclick="applyPreset(0.6,0.5,60,0.5)">Room</button>
+      <button onclick="applyPreset(0.9,0.2,80,0.7)">Chamber</button>
+      <button onclick="applyPreset(0.4,0.6,40,0.4)">Studio</button>
+    </div>
+
+    <div class="row">
+      <span class="label">room size</span>
+      <input type="range" id="room" min="0" max="1" step="0.01" value="0.9">
+      <span class="val" id="roomVal">0.90</span>
+    </div>
+    <div class="row">
+      <span class="label">damping</span>
+      <input type="range" id="damp" min="0" max="1" step="0.01" value="0.2">
+      <span class="val" id="dampVal">0.20</span>
+    </div>
+    <div class="row">
+      <span class="label">width</span>
+      <input type="range" id="width" min="0" max="100" step="1" value="80">
+      <span class="val" id="widthVal">80</span>
+    </div>
+    <div class="row">
+      <span class="label">level</span>
+      <input type="range" id="level" min="0" max="1" step="0.01" value="0.7">
+      <span class="val" id="levelVal">0.70</span>
+    </div>
+
+    <hr class="divider">
+
+    <div class="cmd-label">Paste into fluidsynth shell</div>
+    <div class="cmd-box" id="cmd"></div>
+    <button class="copy-btn" onclick="copyCmd()">Copy commands</button>
+
+    <div class="footer">Authored by Claude &mdash; Anthropic</div>
+  </div>
+
+  <script>
+    function update() {
+      const room  = parseFloat(document.getElementById('room').value);
+      const damp  = parseFloat(document.getElementById('damp').value);
+      const width = parseInt(document.getElementById('width').value);
+      const level = parseFloat(document.getElementById('level').value);
+
+      document.getElementById('roomVal').textContent  = room.toFixed(2);
+      document.getElementById('dampVal').textContent  = damp.toFixed(2);
+      document.getElementById('widthVal').textContent = width;
+      document.getElementById('levelVal').textContent = level.toFixed(2);
+
+      document.getElementById('cmd').textContent =
+        'set synth.reverb.active 1\n\n' +
+        'set synth.reverb.room-size ' + room.toFixed(2) + '\n' +
+        'set synth.reverb.damp '      + damp.toFixed(2) + '\n' +
+        'set synth.reverb.width '     + width + '\n' +
+        'set synth.reverb.level '     + level.toFixed(2);
+    }
+
+    function applyPreset(room, damp, width, level) {
+      document.getElementById('room').value  = room;
+      document.getElementById('damp').value  = damp;
+      document.getElementById('width').value = width;
+      document.getElementById('level').value = level;
+      update();
+    }
+
+    function copyCmd() {
+      navigator.clipboard.writeText(document.getElementById('cmd').textContent).then(() => {
+        const btn = document.querySelector('.copy-btn');
+        btn.textContent = 'Copied!';
+        setTimeout(() => btn.textContent = 'Copy commands', 1500);
+      });
+    }
+
+    ['room','damp','width','level'].forEach(s =>
+      document.getElementById(s).addEventListener('input', update)
+    );
+    update();
+  </script>
+</body>
+</html>
\ No newline at end of file
