Web Voice AI Designs (Livekit)
Jin Park
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Posted Jan 17, 2026
Engineered responsive Voice AI components via LiveKit SDK. Manages full WebRTC lifecycle, transforming audio into branded, interactive experiences.
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Custom LiveKit Frontend Integration & Audio Visualizers
A suite of high-performance, custom Voice AI interfaces built with the LiveKit JavaScript SDK.
I engineered these responsive frontend components to demonstrate that Voice AI embeds don't have to be generic. I utilized LiveKit's Client-Side SDK to manage the full WebRTC lifecycle, transforming standard audio streams into branded, interactive experiences.
Technical Implementation
🔌 Client-Side SDK Integration
Session Management: Implemented logic to consume backend authentication tokens and initialize LiveKit sessions (
Room.connect).Track Subscription: Handled remote track subscription events to ensure audio is routed and played correctly the moment the agent joins.
⚡ Event-Driven UI State
Reactive Interfaces: The buttons are strictly typed to LiveKit room states, providing immediate visual feedback for "Connecting," "Listening," "Speaking," and "Disconnected" events.
Async Handling: Managed asynchronous connection flows to ensure the UI remains responsive while the WebRTC handshake occurs in the background.
📊 Audio Reactivity
Dynamic Visualizers: Built custom UI components that subscribe to the remote
AudioTrack. The interface visualizes volume amplitude in real-time, creating a polished, natural conversational experience.Microphone Logic: Integrated browser-native
getUserMedia permissions handling directly within the interaction flow