Audio FFT Analyzer

A real-time audio spectrum analyzer that captures microphone input and displays live FFT data. Useful for audio debugging, sound visualization, music production, and educational demonstration of digital signal processing concepts.

Features

• Real-Time FFT — Live FFT computation from microphone input with configurable window size
• Spectrum Visualization — Frequency magnitude plot with peak hold and averaging
• Recording & Playback — Capture audio for offline analysis and replay
• Multiple Window Functions — Selectable FFT window types (Hanning, Hamming, Blackman, etc.)
• Pause & Inspect — Freeze the display to examine specific frequency content

Tech Stack

• Kotlin + Jetpack Compose
• Custom FFT implementation in Kotlin
• AudioRecord API for real-time microphone capture
• Canvas-based spectrum rendering