Bungee

Audio timescale and pitch manipulation technology

Bungee (Open Source)

Bungee is an open-source audio processing library designed to change playback speed without affecting pitch—or adjust pitch without altering speed.

  • Implements a basic phase vocoder for reliable performance across all audio types.
  • Supports all time-stretching ratios, including reverse (negative) and zero-speed playback.
  • Shares the same C++ API as Bungee Pro, enabling a seamless upgrade path.

To get started, visit the Bungee repository.

Bungee Pro

Built on the foundation of open-source Bungee, Bungee Pro is a proprietary, professional-grade audio processing technology. It delivers industry-leading audio quality—without the robotic, phasey, or distant artifacts common in conventional timescale modification tools.

  • Compatible with all audio types: speech, vocals, monophonic and polyphonic music.
  • No compromises: expert-developed and AI-enhanced algorithms preserve crisp transients, lush tones, and authentic timbre.
  • Optimized for modern consumer devices with efficient energy and memory usage.

The Bungee Pro Native SDK includes C++ headers together with binary libraries for iOS, macOS, Windows, Linux, and Android.

The Bungee Pro Web SDK brings Bungee Pro’s high-fidelity audio processing to the web. It enables web applications to stretch, warp, and pitch-shift audio directly in all major browsers and webviews. The Web SDK also powers our interactive demo.

Both SDKs are available under simple, developer-friendly licensing terms. If your project could benefit from Bungee Pro’s performance and audio quality then we’d love to hear from you.

E
The demo left our team and some external consultants thoroughly impressed. They mentioned they hadn’t heard anything better in this domain.
T
It's really good to my ear, excellent work. If it were possible to have it selectable as a daw algorithm I'd pay for this for sure. keep us posted please!
A
Absolutely delightful. Can we get this in Reaper? Like, right away please? :D
B
I guess this is by far the best open source stretcher