update README

README.md

@@ -16,16 +16,16 @@ hear-on-out uses your geolocation to fetch current weather and air quality data,
 - Smooth transitions between progressions
 
 **Instruments**
-- **Ambient Pad**: Day/night reactive foundation with triangle (day) or sine (night) oscillators
-- **Main Arpeggio**: Temperature-reactive note patterns with variable speed (1n → 8n) and volume
-- **Ping Arpeggio**: High-pitched reverse arpeggios that intensify with weather extremity, speed scales with temperature
-- **Bass Synth**: Root note foundation with randomized release times
+- **Ambient Pad**: Lush detuned fat oscillator (3 voices, 30 cent spread) with day/night reactive envelopes for rich, warm soundscapes
+- **Main Arpeggio**: Temperature-reactive note patterns with variable speed (1n → 8n) and volume, bypasses filter for clarity
+- **Ping Arpeggio**: High-pitched reverse arpeggios that intensify with weather extremity, speed scales with temperature (1n → 16n)
+- **Bass Synth**: Root note foundation with randomized release times for subtle variation
 
 **Dynamic Audio Parameters**
-- **BPM**: Scales with temperature (10 BPM at 0°C → faster at 30°C+, 2x multiplier for daytime)
+- **BPM**: Scales linearly with temperature (5 BPM at 0°C → 30 BPM at 30°C)
 - **Reverb**: Wet signal responds to humidity (more humid = more reverb)
 - **Delay**: Time and feedback react to wind speed (faster wind = shorter delay, more feedback)
-- **Filter**: Cutoff frequency darkens with cloud cover (clear sky = 8000Hz, overcast = 400Hz)
+- **Filter**: Applied only to ambient pad, cutoff frequency brightens with temperature (0°C = 400Hz dark, 30°C = 8000Hz bright)
 - **Resonance**: Increases with wind speed for sharper filtering
 
 ### Air Quality Monitor
@@ -37,10 +37,11 @@ hear-on-out uses your geolocation to fetch current weather and air quality data,
 
 ### Audio Visualization
 
-- Real-time particle system using p5.js
+- Real-time particle system using p5.js (40 particles for optimal performance)
 - FFT analysis for bass, mid, and treble frequency detection
 - Particles react to audio levels with dynamic size and movement
 - Connected particle network with proximity-based relationships
+- Performance optimizations: 30fps rendering, reduced connection checks, pauses when tab not focused
 
 ## Technologies
 
@@ -50,6 +51,16 @@ hear-on-out uses your geolocation to fetch current weather and air quality data,
 - **Tailwind CSS v4** - Styling with black/white monochrome theme
 - **Open-Meteo API** - Weather and air quality data
 
+## Performance Optimizations
+
+The application includes several optimizations for smooth performance:
+
+- **Reduced particle count**: 40 particles (down from 60) with 30fps rendering
+- **Selective updates**: Audio-reactive displacement updates every 3rd frame
+- **Optimized connections**: Particle connections drawn every other frame with limited neighbor checking
+- **Tab visibility**: Visualization pauses when tab is not focused to save resources
+- **Efficient audio routing**: Arpeggios bypass filter for cleaner CPU usage
+
 ## Setup
 
 ```bash