This paper presents Gamelanizer, a novel real-time audio effect inspired by Javanese gamelan music theory. It is composed of anticipatory or “negative” delay and time and pitch manipulations based on the phase vocoder. An open-source real-time C++Virtual Studio Technology (VST) implementation of the effect, made with the JUCE framework, is available at github.com/lukemcraig/ DAFx19-Gamelanizer, as well as audio examples and Python implementations of vectorized and frame by frame approaches.