BasicMusicVisualizer

A SwiftUI iOS app that listens through the microphone and visualizes the music it hears in real time. Incoming audio is run through a Fast Fourier Transform, mapped to the twelve musical notes, and rendered as colored bars whose intensity tracks each note's magnitude.

An early project exploring real-time DSP on iOS with Apple's Accelerate framework.

Stack

• SwiftUI for the interface
• AVFoundation for microphone capture
• Accelerate (vDSP) for the FFT and magnitude math

How it works

1. SoundAnalyzer captures PCM samples and computes an in-place FFT, plus an RMS/VU power meter.
2. Frequency bins are thresholded and grouped into notes via a simple linear frequency-to-note mapping.
3. NoteManager assigns each of the 12 notes a color; ContentView animates them.

Build & Run

Requires Xcode and an iOS device or simulator.

1. Open BasicMusicVisualizer.xcodeproj.
2. Select a target and press Run.
3. Grant microphone access when prompted, then play or hum near the device.

License

MIT — see LICENSE.