diff --git a/webapp/generate.html b/webapp/generate.html
index 700b171..24c7f9a 100644
--- a/webapp/generate.html
+++ b/webapp/generate.html
@@ -610,7 +610,10 @@
                 const transcribeResponse = await fetch('/api/transcribe', {
                     method: 'POST',
                     headers: {'Content-Type': 'application/json'},
-                    body: JSON.stringify({ name: transcribeName })
+                    body: JSON.stringify({ 
+                        name: transcribeName,
+                        fundamental: parseFloat(document.getElementById('fundamental').value) || 55
+                    })
                 });
                 
                 const transcribeResult = await transcribeResponse.json();
diff --git a/webapp/path_navigator.html b/webapp/path_navigator.html
index 9e0edf2..fb777d3 100644
--- a/webapp/path_navigator.html
+++ b/webapp/path_navigator.html
@@ -308,6 +308,27 @@
             color: #999999;
             border-color: #444444;
         }
+        
+        .toggle-btn, .siren-btn {
+            padding: 6px 12px;
+            font-size: 12px;
+            cursor: pointer;
+            background: #0a0a0a;
+            color: #666666;
+            border: 1px solid #222222;
+            border-radius: 3px;
+            margin: 0 2px;
+        }
+        .toggle-btn:hover, .siren-btn:hover {
+            background: #151515;
+            color: #999999;
+            border-color: #444444;
+        }
+        .toggle-btn.active, .siren-btn.active {
+            background: #1a3a1a;
+            color: #66cc66;
+            border-color: #2a5a2a;
+        }
     </style>
 </head>
 <body>
@@ -344,13 +365,21 @@
             </div>
             <span style="margin-left: 15px;">Siren IP:</span>
             <input type="text" id="sirenIp" value="192.168.4.200" style="width: 100px;">
-            <button id="toggleUnitBtn" style="margin-left: 15px;">Show: Cents</button>
+            <button id="toggleUnitBtn" class="toggle-btn">Show: Cents</button>
         </div>
         
         <div class="controls">
             <button id="prevBtn" disabled>← Previous</button>
             <span class="index-display">Index: <span id="currentIndex">0</span> / <span id="totalSteps">0</span></span>
             <button id="nextBtn" disabled>Next →</button>
+            <span style="margin-left: 20px; border-left: 1px solid #333; padding-left: 20px;">
+                <button id="rampBtn" class="toggle-btn">RAMP: OFF</button>
+                <button id="siren1Btn" class="siren-btn">1</button>
+                <button id="siren2Btn" class="siren-btn">2</button>
+                <button id="siren3Btn" class="siren-btn">3</button>
+                <button id="siren4Btn" class="siren-btn">4</button>
+                <button id="sirenABtn" class="siren-btn">A</button>
+            </span>
         </div>
         
         <div id="graph-container"></div>
@@ -374,6 +403,8 @@
     <script>
         // Global state
         let chords = [];
+        let selectedSiren = 0;  // 0 = use node's voice, 1-4 = selected siren
+        let rampMode = false;    // false = play, true = ramp
         let currentIndex = 0;
         let totalSteps = 0;
         let hasPrev = false;
@@ -381,6 +412,31 @@
         let allGraphsData = null;
         let displayMode = 'cents';
         
+        // Update UI buttons based on state
+        function updateRampButton() {
+            const btn = document.getElementById('rampBtn');
+            if (btn) {
+                btn.textContent = rampMode ? 'RAMP: ON' : 'RAMP: OFF';
+                btn.classList.toggle('active', rampMode);
+            }
+        }
+        
+        function updateSirenButtons() {
+            const buttons = [
+                { id: 'siren1Btn', value: 1 },
+                { id: 'siren2Btn', value: 2 },
+                { id: 'siren3Btn', value: 3 },
+                { id: 'siren4Btn', value: 4 },
+                { id: 'sirenABtn', value: 0 },
+            ];
+            buttons.forEach(({ id, value }) => {
+                const btn = document.getElementById(id);
+                if (btn) {
+                    btn.classList.toggle('active', selectedSiren === value);
+                }
+            });
+        }
+        
         function adjustValue(id, delta) {
             const input = document.getElementById(id);
             const min = parseFloat(input.min) || -Infinity;
@@ -416,17 +472,24 @@
             // Play each node using chordIndex + localId (let server calculate frequency)
             nodes.forEach((node) => {
                 const localId = node.data('localId');
+                // Label always uses auto (node's voice)
+                const body = { 
+                    chordIndex: chordIdx, 
+                    nodeIndex: localId,
+                    ip: sirenIp,
+                };
+                // Only add sirenNumber if a specific siren is selected
+                if (selectedSiren > 0) {
+                    body.sirenNumber = selectedSiren;
+                }
                 
                 fetch('/api/play-siren', {
                     method: 'POST',
                     headers: {'Content-Type': 'application/json'},
-                    body: JSON.stringify({ 
-                        chordIndex: chordIdx, 
-                        nodeIndex: localId,
-                        ip: sirenIp
-                    })
+                    body: JSON.stringify(body)
                 });
                 node.data('sirenActive', 'true');
+                node.data('borderColor', voiceColors[localId % 4]);
             });
         }
         
@@ -459,16 +522,23 @@
                 nodes.forEach(node => node.data('sirenActive', 'true'));
             }
             
+            const rampBody = {
+                chordIndex: chordIdx,
+                nodeIndex: nodeIdx,
+                duration: durationMs,
+                exponent: exponent,
+                ip: sirenIp
+            };
+            
+            // Only add sirenNumber if a specific siren is selected (> 0), otherwise use node's voice
+            if (selectedSiren > 0) {
+                rampBody.sirenNumber = selectedSiren;
+            }
+            
             fetch('/api/ramp-to-chord', {
                 method: 'POST',
                 headers: {'Content-Type': 'application/json'},
-                body: JSON.stringify({
-                    chordIndex: chordIdx,
-                    nodeIndex: nodeIdx,
-                    duration: durationMs,
-                    exponent: exponent,
-                    ip: sirenIp
-                })
+                body: JSON.stringify(rampBody)
             }).then(r => r.json()).then(data => {
                 console.log('Ramping:', data);
             }).catch(err => {
@@ -482,6 +552,7 @@
             const btn = document.getElementById('toggleUnitBtn');
             if (btn) {
                 btn.textContent = displayMode === 'cents' ? 'Show: Cents' : 'Show: Frequency';
+                btn.classList.toggle('active', displayMode === 'frequency');
             }
             
             if (!cy) return;
@@ -568,7 +639,7 @@
                         selector: 'node[sirenActive = "true"]',
                         style: {
                             'border-width': 4,
-                            'border-color': '#ffffff',
+                            'border-color': 'data(borderColor)',
                             'border-opacity': 1,
                         }
                     },
@@ -665,12 +736,11 @@
                 
                 // Check modifiers
                 const isShift = evt.originalEvent && evt.originalEvent.shiftKey;
-                const isRamp = evt.originalEvent && evt.originalEvent.ctrlKey;
                 
                 // Handle label node clicks
                 if (node.data('isLabel')) {
                     const chordIdx = node.data('chordIndex');
-                    if (isRamp) {
+                    if (rampMode || isShift) {
                         rampToChord(chordIdx);
                     } else {
                         playChordOnSiren(chordIdx);
@@ -680,45 +750,75 @@
                 
                 const chordIndex = node.data('chordIndex');
                 const localId = node.data('localId');
+                const sirenIp = document.getElementById('sirenIp').value || "192.168.4.200";
                 
-                // Handle ramp modifier
-                if (isRamp) {
+                // Determine action: ramp or play
+                if (rampMode || isShift) {
+                    // Ramp to siren
                     rampToChord(chordIndex, localId);
                     return;
                 }
                 
-                // Check if Shift key is held - send to siren, otherwise send to SuperCollider
-                const endpoint = isShift ? '/api/play-siren' : '/api/play-freq';
-                const destination = isShift ? 'siren' : 'SuperCollider';
-                const sirenIp = document.getElementById('sirenIp').value || "192.168.4.200";
+                // Check if Shift key is held - send to SuperCollider
+                if (isShift) {
+                    // Send to SuperCollider
+                    const endpoint = '/api/play-freq';
+                    const sirenIp = document.getElementById('sirenIp').value || "192.168.4.200";
+                    
+                    const requestBody = {
+                        chordIndex: chordIndex,
+                        nodeIndex: localId,
+                        octave: parseInt(document.getElementById('octaveInput').value) || 0,
+                    };
+                    
+                    console.log('Sending to SuperCollider:', chordIndex, localId);
+                    
+                    fetch(endpoint, {
+                        method: 'POST',
+                        headers: {'Content-Type': 'application/json'},
+                        body: JSON.stringify(requestBody)
+                    });
+                    return;
+                }
                 
-                console.log('Sending play request to', destination, ':', chordIndex, localId);
+                // Plain click: play to siren
+                const endpoint = '/api/play-siren';
+                const destination = 'siren';
+                
+                // Determine which siren: if selectedSiren > 0 use it, otherwise use node's voice (localId + 1)
+                const actualSiren = selectedSiren > 0 ? selectedSiren : localId + 1;
+                
+                console.log('Sending to siren:', chordIndex, localId, 'siren:', actualSiren);
+                
+                const requestBody = {
+                    chordIndex: chordIndex,
+                    nodeIndex: localId,
+                    ip: sirenIp,
+                    sirenNumber: actualSiren
+                };
                 
                 fetch(endpoint, {
                     method: 'POST',
                     headers: {'Content-Type': 'application/json'},
-                    body: JSON.stringify({
-                        chordIndex: chordIndex,
-                        nodeIndex: localId,
-                        octave: parseInt(document.getElementById('octaveInput').value) || 0,
-                        ip: sirenIp
-                    })
+                    body: JSON.stringify(requestBody)
                 }).then(r => r.json()).then(data => {
-                    console.log('Playing on', destination + ':', data.frequency.toFixed(2), 'Hz on voice', data.voice);
+                    console.log('Playing on', destination + ':', data.frequency.toFixed(2), 'Hz on siren', data.siren);
                     
-                    // If playing on siren, add white circle around node for this voice
-                    if (isShift) {
-                        const nodeColor = node.data('color');
-                        // Find any existing node with same color that has sirenActive and remove it
-                        cy.nodes().forEach(n => {
-                            if (n.data('color') === nodeColor && n.data('sirenActive')) {
-                                n.data('sirenActive', '');
-                            }
-                        });
-                        // Add sirenActive to clicked node
-                        node.data('sirenActive', 'true');
-                        console.log('Added sirenActive to', node.id(), 'color:', nodeColor);
-                    }
+                    // Add colored circle around node based on siren
+                    const sirenColors = ['#7eb5a6', '#c5a3ff', '#ffb3b3', '#ffd700'];
+                    const borderColor = sirenColors[(actualSiren - 1) % 4];
+                    
+                    // Find any existing node with same border color that has sirenActive and remove it
+                    cy.nodes().forEach(n => {
+                        if (n.data('borderColor') === borderColor && n.data('sirenActive')) {
+                            n.data('sirenActive', '');
+                            n.data('borderColor', '');
+                        }
+                    });
+                    // Add sirenActive to clicked node
+                    node.data('sirenActive', 'true');
+                    node.data('borderColor', borderColor);
+                    console.log('Added sirenActive to', node.id(), 'color:', borderColor);
                 }).catch(err => {
                     console.log('Error playing freq:', err);
                 });
@@ -1224,8 +1324,35 @@
             navigate('next');
         });
         
+        // Toggle buttons
+        document.getElementById("rampBtn").addEventListener("click", () => {
+            rampMode = !rampMode;
+            console.log('Ramp mode:', rampMode);
+            updateRampButton();
+        });
+        
+        document.getElementById("siren1Btn").addEventListener("click", () => { selectedSiren = 1; updateSirenButtons(); });
+        document.getElementById("siren2Btn").addEventListener("click", () => { selectedSiren = 2; updateSirenButtons(); });
+        document.getElementById("siren3Btn").addEventListener("click", () => { selectedSiren = 3; updateSirenButtons(); });
+        document.getElementById("siren4Btn").addEventListener("click", () => { selectedSiren = 4; updateSirenButtons(); });
+        document.getElementById("sirenABtn").addEventListener("click", () => { selectedSiren = 0; updateSirenButtons(); });
+        
+        // Initialize button states
+        updateRampButton();
+        updateSirenButtons();
+        
         // Keyboard navigation
         document.addEventListener("keydown", (e) => {
+            // Don't trigger siren/ramp hotkeys when typing in input fields
+            if (e.target.tagName === 'INPUT') {
+                // Skip siren/ramp hotkeys but allow other keys
+                if (e.key >= '1' && e.key <= '4' || 
+                    e.key === '0' || e.key === 'a' || e.key === 'A' ||
+                    e.key === 'r' || e.key === 'R') {
+                    return;
+                }
+            }
+            
             if (e.key === "ArrowLeft") {
                 navigate('prev');
             } else if (e.key === "ArrowRight") {
@@ -1242,6 +1369,21 @@
                     const zoom = cy.zoom();
                     cy.zoom({ zoomLevel: Math.max(0.3, zoom / 1.1), renderedPosition: { x: cy.width()/2, y: cy.height()/2 } });
                 }
+            } else if (e.key >= '1' && e.key <= '4') {
+                // Select siren 1-4
+                selectedSiren = parseInt(e.key);
+                console.log('Selected siren:', selectedSiren);
+                updateSirenButtons();
+            } else if (e.key === '0' || e.key === 'a' || e.key === 'A') {
+                // Auto mode - use node's voice
+                selectedSiren = 0;
+                console.log('Auto mode: use node voice');
+                updateSirenButtons();
+            } else if (e.key === 'r' || e.key === 'R') {
+                // Toggle ramp mode
+                rampMode = !rampMode;
+                console.log('Ramp mode:', rampMode);
+                updateRampButton();
             } else if (e.key === "k") {
                 // Soft kill - send 20 Hz to stop voices gently
                 const sirenIp = document.getElementById('sirenIp').value || "192.168.4.200";
@@ -1252,7 +1394,10 @@
                 }).then(r => r.json()).then(data => {
                     console.log('Soft kill sent (20 Hz)');
                     // Clear all siren circles
-                    cy.nodes().forEach(n => n.removeData('sirenActive'));
+                    cy.nodes().forEach(n => {
+                        n.removeData('sirenActive');
+                        n.removeData('borderColor');
+                    });
                 }).catch(err => {
                     console.log('Error sending kill:', err);
                 });
@@ -1266,7 +1411,10 @@
                 }).then(r => r.json()).then(data => {
                     console.log('Hard kill sent (0 Hz)');
                     // Clear all siren circles
-                    cy.nodes().forEach(n => n.removeData('sirenActive'));
+                    cy.nodes().forEach(n => {
+                        n.removeData('sirenActive');
+                        n.removeData('borderColor');
+                    });
                 }).catch(err => {
                     console.log('Error sending kill:', err);
                 });
diff --git a/webapp/server.log b/webapp/server.log
new file mode 100644
index 0000000..afa723d
--- /dev/null
+++ b/webapp/server.log
@@ -0,0 +1,47 @@
+Starting Path Navigator server...
+Loading chords from: /home/mwinter/Sketches/compact_sets/output/output_chords.json
+Loaded 64 chords
+ * Serving Flask app 'server'
+ * Debug mode: on
+WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on all addresses (0.0.0.0)
+ * Running on http://127.0.0.1:8080
+ * Running on http://192.168.178.32:8080
+Press CTRL+C to quit
+ * Restarting with stat
+ * Debugger is active!
+ * Debugger PIN: 477-276-956
+127.0.0.1 - - [20/Apr/2026 12:19:07] "GET / HTTP/1.1" 304 -
+127.0.0.1 - - [20/Apr/2026 12:19:08] "GET /api/chords HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:08] "POST /api/batch-calculate-cents HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:24] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:27] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:29] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:31] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:32] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:35] "POST /api/play-freq HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:37] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:38] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:41] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:41] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:41] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:41] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:45] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:45] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:45] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:45] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:56] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:57] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:58] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:19:59] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:20:02] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:20:03] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:20:06] "POST /api/ramp-to-chord HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:20:11] "POST /api/ramp-to-chord HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:20:23] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:20:23] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:20:23] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:20:23] "POST /api/play-siren HTTP/1.1" 200 -
+127.0.0.1 - - [20/Apr/2026 12:20:26] "POST /api/ramp-to-chord HTTP/1.1" 200 -
+/usr/lib/python3.14/multiprocessing/resource_tracker.py:396: UserWarning: resource_tracker: There appear to be 1 leaked semaphore objects to clean up at shutdown: {'/mp-naea0l96'}
+  warnings.warn(
diff --git a/webapp/server.py b/webapp/server.py
index 33d6443..5b23418 100644
--- a/webapp/server.py
+++ b/webapp/server.py
@@ -144,6 +144,7 @@ def play_siren():
     chord_index = data.get("chordIndex")
     node_index = data.get("nodeIndex")
     siren_ip = data.get("ip", "192.168.4.200")  # Default to actual siren IP
+    siren_number = data.get("sirenNumber")  # NEW: optional 1-4
 
     if chord_index is None or node_index is None:
         return jsonify({"error": "Missing chordIndex/nodeIndex"}), 400
@@ -158,7 +159,7 @@ def play_siren():
     pitch = chord[node_index]
     fraction = Fraction(pitch.get("fraction", "1"))
     frequency = fundamental * float(fraction)
-    voice = node_index + 1  # 1-indexed
+    voice = siren_number if siren_number else node_index + 1  # 1-indexed
 
     # Send to siren using cached sender
     siren_sender = get_siren_sender(siren_ip)
@@ -169,6 +170,7 @@ def play_siren():
         {
             "frequency": frequency,
             "voice": voice,
+            "siren": siren_number,
             "destination": "siren",
             "ip": siren_ip,
         }
@@ -214,6 +216,7 @@ def ramp_to_chord():
     duration_ms = data.get("duration", 3000)
     exponent = data.get("exponent", 1.0)
     siren_ip = data.get("ip", "192.168.4.200")  # Default to actual siren IP
+    siren_number = data.get("sirenNumber")  # NEW: optional 1-4
 
     if chord_index is None:
         return jsonify({"error": "Missing chordIndex"}), 400
@@ -234,7 +237,7 @@ def ramp_to_chord():
         pitch = chord[node_index]
         fraction = Fraction(pitch.get("fraction", "1"))
         frequency = fundamental * float(fraction)
-        voice = node_index + 1  # 1-indexed
+        voice = siren_number if siren_number else (node_index + 1)  # 1-indexed
 
         # Ramp single voice - let sender get start frequency from current position
         siren_sender.ramp_to_pitch(
@@ -527,4 +530,4 @@ if __name__ == "__main__":
     print(f"Loading chords from: {filepath}")
     load_chords()
     print(f"Loaded {len(chords)} chords")
-    app.run(host="0.0.0.0", port=8080, debug=True)
+    app.run(host="0.0.0.0", port=8080, debug=False)
