Overdubber

A multi-track audio layering app for iOS. Record a take, then overdub as many layers as you want — like a portable tape machine.

appstore: https://apps.apple.com/us/app/overdubber/id6762368689 demo: https://youtu.be/U47ZLFZjnVQ

Features

• Layer-based recording — Record your first take, then overdub on top with live playback of previous layers
• Mixer — Per-layer volume controls and mute toggles
• Loop recording — Automatically loop at the project duration for hands-free overdubbing
• Tape warmth — Optional analog saturation effect applied during recording
• Input monitoring — Hear yourself through headphones while recording
• Waveform display — Visual waveforms for each layer and live input
• Export — Mix down to M4A or WAV and share
• Themes — Standard, Portastudio, Synth, and Sampler color schemes
• Project library — Save, rename, and manage multiple projects

Requirements

• iOS 17.0+
• Xcode 16+
• Microphone access

Architecture

SwiftUI + MVVM, backed by SwiftData for project/layer persistence and AVAudioEngine for all audio.

overdubber/
├── Models/              # SwiftData models (Project, Layer)
├── ViewModels/          # RecorderViewModel
├── Views/               # SwiftUI views
├── AudioEngine/         # AVAudioEngine, export, waveform generation
└── Utilities/           # Theme, purchases, ads

Building

Open overdubber.xcodeproj in Xcode and run on a physical device (microphone required).

License

All rights reserved.