Introduction

Krisp provides a JS SDK with an out-of-the-box application architecture that allows developers and teams to integrate AI-powered speech clarity features in real-time communication applications.

Krisp SDK is the only robust Javascript-based Noise Cancellation SDK available for browsers. Running audio AI inside the browsers is challenging for various reasons.

Audio Pipeline and Processing

Krisp Javascript SDK is integrated with WebRTC and Web Audio as a noise audio filter.

The noise-canceling neural network is built on WASM for high performance.

The SDK receives audio buffers in chunks and processes them in a dedicated worker to offload the main thread.

Supported Audio Characteristics

Audio frame duration

10ms *

* While an audio stream of any frame size is supported, Krisp SDK processing is performed using 10ms frames.

Audio sample rates

8KHz, 16KHz, 32KHz, 24KHz, 44.1KHz, 48KHz, 88.2KHz, 96KHz

Performance

  • Package Size: 12MB
  • Memory Footprint: ~100 MB
  • Frame Processing: 1.5-2ms

Outbound (Mic) Noise Cancellation

Benchmarks conducted for JS SDK v1.0.12 with Chrome v113 on Mac M1 and Chrome v114 on Windows and Mac Intel on the same reference computers used for Desktop. On Mac M1 Krisp SDK runs ~85% on efficiency cores resulting in relatively higher CPU% but ensuring better battery performance.

Benchmarks conducted for JS SDK v1.0.12 with Chrome v113 on Mac M1 and Chrome v114 on Windows and Mac Intel on the same reference computers used for Desktop. On Mac M1 Krisp SDK runs ~85% on efficiency cores resulting in relatively higher CPU% but ensuring better battery performance.

Inbound (Speaker) Noise Cancellation

Benchmarks conducted for JS SDK v1.0.12 with Chrome v113 on Mac M1 and Chrome v114 on Windows and Mac Intel on the same reference computers used for Desktop.

Benchmarks conducted for JS SDK v1.0.12 with Chrome v113 on Mac M1 and Chrome v114 on Windows and Mac Intel on the same reference computers used for Desktop.

Background Voice Cancellation

Benchmarks conducted for JS SDK v1.1.0 with Chrome v113 on Mac M1 and Chrome v114 on Windows and Mac Intel on the same reference computers used for Desktop.

Benchmarks conducted for JS SDK v1.1.0 with Chrome v113 on Mac M1 and Chrome v114 on Windows and Mac Intel on the same reference computers used for Desktop.

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Important Notes

  • CPU% is generally higher in JS SDK compared to native SDK. This is expected as the code runs in the browser in different worker threads, which provides improved stability and eliminates memory leaks.
  • Krisp JS SDK is not supported on mobile browsers. Krisp recommends using Native iOS and Android SDKs for mobile applications.
  • Safari browser is not supported due to inconsistent performance across different versions caused by internal bugs in Safari proper.