Some changes to the main visualizer

src/App.svelte

@@ -31,7 +31,6 @@
     glowIntensity: 0.6,
     logoSpin: false,
     logoSpinSpeed: 5,
-    autoSubtitle: false,
     titlePosition: "top",
   };
 
@@ -72,9 +71,7 @@
   let glowIntensity = saved.glowIntensity;
   let logoSpin = saved.logoSpin;
   let logoSpinSpeed = saved.logoSpinSpeed;
-  let autoSubtitle = saved.autoSubtitle;
   let titlePosition = saved.titlePosition;
-  let capturedTrackLabel = "";
   let visualizerComponent;
   let toggleHidden = false;
   let hideTimer;
@@ -102,10 +99,6 @@
     clearTimeout(hideTimer);
   }
 
-  $: if (autoSubtitle && capturedTrackLabel) {
-    subtitle = capturedTrackLabel;
-  }
-
   $: {
     const settings = {
       selectedPreset,
@@ -133,7 +126,6 @@
       glowIntensity,
       logoSpin,
       logoSpinSpeed,
-      autoSubtitle,
       titlePosition,
     };
     try {
@@ -191,7 +183,6 @@
     glowIntensity = defaults.glowIntensity;
     logoSpin = defaults.logoSpin;
     logoSpinSpeed = defaults.logoSpinSpeed;
-    autoSubtitle = defaults.autoSubtitle;
     titlePosition = defaults.titlePosition;
   }
 
@@ -320,7 +311,6 @@
       {glowIntensity}
       {logoSpin}
       {logoSpinSpeed}
-      bind:capturedTrackLabel
       bind:isListening
       bind:fileCurrentTime
       bind:fileDuration
@@ -391,7 +381,6 @@
       bind:glowIntensity
       bind:logoSpin
       bind:logoSpinSpeed
-      bind:autoSubtitle
       bind:titlePosition
       {isListening}
       {colorPresets}

src/lib/AudioVisualizer.svelte

@@ -22,7 +22,7 @@
 
   const DEFAULT_SIZE = 250;
   const LINE_LIFT = 8;
-  const FREQ_RANGE = 0.55;
+  const FREQ_RANGE = 0.28;
   const INV_255 = 1 / 255;
   const SMOOTH_FACTOR = 0.45;
   const SCALE_SMOOTH = 0.15;
@@ -39,9 +39,6 @@
   let currentStream = null;
   let audioElement = null;
   let audioSourceNode = null;
-  let capturedAudioTrack = null;
-  let tabTitleInterval = null;
-  export let capturedTrackLabel = "";
   let dataArray = new Uint8Array(128);
   let bufferLength = 128;
 
@@ -277,16 +274,6 @@
       // Stop the video track immediately — we only need audio
       stream.getVideoTracks().forEach((t) => t.stop());
 
-      // Store audio track for label polling (tab title)
-      capturedAudioTrack = audioTracks[0];
-      tabTitleInterval = setInterval(() => {
-        if (capturedAudioTrack && capturedAudioTrack.readyState === "live") {
-          capturedTrackLabel = capturedAudioTrack.label || "";
-        } else {
-          capturedTrackLabel = "";
-        }
-      }, 1000);
-
       // Handle stream ending (user clicks "Stop sharing")
       stream.addEventListener("inactive", () => stopListening());
       audioTracks.forEach((track) =>
@@ -322,11 +309,8 @@
 
     let sum = 0;
     for (let i = 0; i < halfBars; i++) {
-      const t = i / halfBars;
+      const t = i / (halfBars - 1 || 1);
-      const binIdx = Math.min(
+      const binIdx = Math.min(usableBins - 1, (t * (usableBins - 1)) | 0);
-        usableBins - 1,
-        (Math.pow(t, 1.15) * usableBins) | 0,
-      );
       const lo = Math.max(0, binIdx - 1);
       const hi = Math.min(usableBins - 1, binIdx + 1);
       const raw =
@@ -334,11 +318,13 @@
           (dataArray[binIdx] || 0) +
           (dataArray[hi] || 0)) /
         3;
-      // Bass emphasis controlled by prop
+      // Normalize and apply sensitivity
-      const bassBoost = 1 + (1 - t) * bassEmphasis;
+      const normalized = Math.min(1, (raw * sensitivity) / 255);
-      // Sensitivity multiplier
+      // Gentle curve to keep activity spread evenly
-      const normalized = Math.min(1, (raw * bassBoost * sensitivity) / 255);
+      const curved = Math.pow(normalized, 8);
-      const spiked = Math.pow(normalized, 16.0) * 255;
+      // Optional bass emphasis as additive boost for lower bars
+      const bassBoost = (1 - t) * bassEmphasis * normalized * 0.3;
+      const spiked = Math.min(1, curved + bassBoost) * 255;
       smoothedValues[i] += (spiked - smoothedValues[i]) * SMOOTH_FACTOR;
     }
     // Spatial smoothing: blend adjacent bars for a more unified shape
@@ -734,12 +720,6 @@
       audioContext = null;
     }
     audioSourceNode = null;
-    capturedAudioTrack = null;
-    if (tabTitleInterval) {
-      clearInterval(tabTitleInterval);
-      tabTitleInterval = null;
-    }
-    capturedTrackLabel = "";
     isListening = false;
     dataArray = new Uint8Array(bufferLength);
     draw();
@@ -812,7 +792,6 @@
   onDestroy(() => {
     if (animationId) cancelAnimationFrame(animationId);
     if (audioContext) audioContext.close();
-    if (tabTitleInterval) clearInterval(tabTitleInterval);
     window.removeEventListener("resize", updateSize);
   });
 </script>

src/lib/Controls.svelte

@@ -57,7 +57,6 @@
   export let logoSpin = false;
   export let logoSpinSpeed = 5;
   export let titlePosition = "top";
-  export let autoSubtitle = false;
 
   const dispatch = createEventDispatcher();
 
@@ -611,13 +610,7 @@
       bind:value={subtitle}
       placeholder="Subtitle..."
       style="margin-top: 0.35rem"
-      disabled={autoSubtitle}
     />
-    <div class="slider-row" style="margin-top: 0.35rem">
-      <label>
-        <input type="checkbox" bind:checked={autoSubtitle} /> Auto (Tab Title)
-      </label>
-    </div>
     <div class="inline-row" style="margin-top: 0.5rem">
       <input
         type="file"