How Callstack Builds Real-Time Audio Pipelines in React Native
Original post Building Real-Time Audio Pipelines in React Native
Article Summary
Real-time audio in React Native isn't just about playing files anymore. Callstack's engineering team reveals why buffer-based pipelines are becoming essential for voice AI, live streaming, and audio processing apps.
This technical deep-dive from Callstack explores the shift from traditional file-based audio playback to real-time buffer processing in React Native. The article covers the architectural patterns, native integration challenges, and performance considerations needed to build production-grade audio pipelines that can handle streaming data.
Key Takeaways
- Buffer-based audio enables real-time processing for AI voice and streaming features
- JSI and TurboModules provide the low-level access needed for audio pipelines
- Memory ownership between JavaScript and native code requires careful management
- Async processing can break without proper GC and pointer handling patterns
Building real-time audio in React Native requires moving beyond file playback to buffer-based architectures with careful attention to memory ownership and native integration patterns.
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What This Article Covers
Real-time audio pipelines in React Native struggle with ArrayBuffer data shared between JavaScript and native code. Garbage collection and raw pointer handling can break async processing if memory ownership patterns aren't carefully designed.
Callstack's engineering team shows how to use JSI bindings to directly access ArrayBuffers and implement safe memory ownership models. This prevents garbage collection from invalidating native pointers during asynchronous audio buffer operations.
Developers can build production-grade audio pipelines for voice AI and live streaming by following proven patterns for memory management between JavaScript and native code. This eliminates crashes from improper pointer handling in async scenarios.
This page summarizes “Building Real-Time Audio Pipelines in React Native” by Callstack, published Oct 14, 2025. All credit for the original work goes to the authors.
