HOWL: A formant synthesizer

HOWL is a simple vocoder/synthesizer for iPhone and iPad. It uses formants to simulate the human voice and a pitch-space keyboard to help you find interesting melodies. But for the most part it makes expressive grunts, groans, wails, and moaning noises.

HOWL is available on the App Store.

More HOWL videos are available on YouTube.

Open source

HOWL is open source – that means that you can read HOWL's source code and modify it for yourself. It's all available on GitHub.

HOWL is built using AudioKit – the open-source audio toolkit for iOS.

Download HOWL today!