From da02c8977e1813e8bcad4658fe2de3f42fde16e9 Mon Sep 17 00:00:00 2001
From: Jens Mohrmann <mail@jensmohrmann.de>
Date: Sat, 27 Dec 2025 18:54:43 +0100
Subject: [PATCH] Increase mic sensitivity range

---
 src/audio/PitchAnalyzer.ts       | 18 ++++++++----------
 src/components/SettingsModal.tsx | 15 ++++++++++-----
 2 files changed, 18 insertions(+), 15 deletions(-)

diff --git a/src/audio/PitchAnalyzer.ts b/src/audio/PitchAnalyzer.ts
index 2a80dda..5f9104c 100644
--- a/src/audio/PitchAnalyzer.ts
+++ b/src/audio/PitchAnalyzer.ts
@@ -17,22 +17,20 @@ export class PitchAnalyzer {
 
     /**
      * Set sensitivity from 0.0 (least sensitive) to 1.0 (most sensitive).
-     * Maps to RMS threshold:
-     * 0.0 -> 0.1 (Requires loud input)
-     * 0.5 -> 0.03 (Default)
-     * 1.0 -> 0.005 (Very sensitive)
+     * Maps to approximate dB Thresholds:
+     * 0.0 -> -20 dB (0.1 RMS) - Requires loud input
+     * 1.0 -> -60 dB (0.001 RMS) - Very sensitive, picks up background noise
      */
     setSensitivity(value: number) {
         // Clamp value 0-1
         const v = Math.max(0, Math.min(1, value));
 
-        // Linear interpolation or something that feels right
-        // Let's do a simple mapping:
-        // 1.0 -> 0.002
-        // 0.0 -> 0.1
-        // linear: 0.1 - (0.098 * v) roughly
+        // Linear map to dB: -20dB to -60dB
+        // High sensitivity (1.0) = Lower Threshold (-60dB)
+        const db = -20 - (v * 40);
 
-        this.sensitivityThreshold = 0.1 - (0.095 * v);
+        // Convert dB to RMS amplitude
+        this.sensitivityThreshold = Math.pow(10, db / 20);
     }
 
     async start(): Promise<void> {
diff --git a/src/components/SettingsModal.tsx b/src/components/SettingsModal.tsx
index 147d387..8d8e235 100644
--- a/src/components/SettingsModal.tsx
+++ b/src/components/SettingsModal.tsx
@@ -119,8 +119,14 @@ export const SettingsModal: React.FC<SettingsModalProps> = ({ isOpen, onClose, s
                     <label className="control-label" style={{ marginBottom: '12px', fontSize: '16px' }}>
                         <span>Microphone Sensitivity</span>
                     </label>
-                    <div style={{ display: 'flex', alignItems: 'center', gap: '12px' }}>
-                        <span style={{ fontSize: '12px', opacity: 0.7, minWidth: '30px' }}>Low</span>
+                    <div style={{ display: 'flex', flexDirection: 'column', gap: '8px' }}>
+                        <div style={{ display: 'flex', justifyContent: 'space-between', fontSize: '12px', opacity: 0.7 }}>
+                            <span>Low (-20dB)</span>
+                            <span style={{ color: '#4cc9f0' }}>
+                                {Math.round(-20 - ((settings.micSensitivity ?? 0.5) * 40))} dB
+                            </span>
+                            <span>High (-60dB)</span>
+                        </div>
                         <input
                             type="range"
                             min="0"
@@ -128,12 +134,11 @@ export const SettingsModal: React.FC<SettingsModalProps> = ({ isOpen, onClose, s
                             step="0.05"
                             value={settings.micSensitivity ?? 0.5}
                             onChange={(e) => onUpdateSettings({ ...settings, micSensitivity: parseFloat(e.target.value) })}
-                            style={{ flex: 1 }}
+                            style={{ width: '100%' }}
                         />
-                        <span style={{ fontSize: '12px', opacity: 0.7, minWidth: '30px' }}>High</span>
                     </div>
                     <p style={{ fontSize: '12px', opacity: 0.7, margin: '8px 0 0 0' }}>
-                        Adjust if notes are not detected (increase) or if background noise triggers notes (decrease).
+                        Adjust if notes are not detected (increase/right) or if background noise triggers notes (decrease/left).
                     </p>
                 </div>
             </div>