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10/31/2025
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README.md

Microphone Amplifier Web App

A simple web application that acts as a microphone amplifier using the Web Audio API.

Features

  • Real-time microphone amplification - Captures audio from your microphone and amplifies it through your speakers
  • Adjustable gain control - Volume slider to control amplification level (0.1x to 5.0x)
  • Visual audio level indicator - Real-time display of audio input levels with color coding
  • Feedback protection warnings - Built-in warnings to help prevent audio feedback loops
  • Clean, responsive UI - Dark theme with intuitive controls

How to Use

  1. Click "Start Amp" - The browser will request microphone permissions
  2. Grant microphone access - Allow the app to use your microphone
  3. Adjust amplification - Use the slider to control the volume boost
  4. Monitor levels - Watch the audio level indicator to avoid clipping
  5. Click "Stop Amp" - Stops the amplifier and releases the microphone

Important Notes

⚠️ Feedback Warning: This app can create audio feedback loops if your microphone picks up sound from your speakers. To prevent this:

  • Use headphones instead of speakers when possible
  • Start with low amplification levels
  • Keep your microphone away from speakers
  • Be prepared to quickly stop the amp if feedback occurs

Technical Details

  • Uses the Web Audio API for real-time audio processing
  • Disables echo cancellation, noise suppression, and auto-gain control for pure amplification
  • Includes real-time frequency analysis for the visual level indicator
  • Responsive design works on desktop and mobile devices

Browser Compatibility

Works in modern browsers that support:

  • Web Audio API
  • getUserMedia API
  • ES6+ JavaScript features

Safety Features

  • Visual feedback to monitor audio levels
  • Easy stop button to quickly disable amplification
  • Warning messages about potential feedback issues
  • Automatic cleanup when the page is closed or refreshed
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