Real-time audio processing with Expo and native code

Tuneo is a guitar tuner application that exemplifies the capabilities of React Native's New Architecture by combining a high-level TypeScript/JSX orchestration with low-level native modules in C++, Swift, and Kotlin. This hybrid approach allows it to address challenges typically associated with native-only applications, such as real-time audio signal processing, by utilizing TurboModules for direct native communication. The app achieves the low-latency performance needed for live microphone access and accurate pitch detection without compromising the rapid development workflow of React Native. AI tools played a significant role in overcoming hurdles related to the complexities of native development, facilitating tasks like implementing the YIN algorithm for pitch detection and translating code between Python and C++. Expo and React Native streamline the integration and management of native modules, enabling Tuneo to offer high performance and user-friendly features. The app is open-source, ad-free, and tracker-free, inviting contributions and suggestions for future enhancements, which may include supporting more instruments and exploring alternative pitch detection algorithms.

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