> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zeroruntime.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# Cambai
> JavaScript API reference for the cambai text-to-speech plugin.
## CambAITTS
Camb.ai text-to-speech provider.
Creates a configured Camb.ai TTS provider for use in a voice agent.
### Constructor
```typescript theme={null}
new CambAITTS(opts: CambAITTSOptions)
```
Camb.ai API key. Falls back to the `CAMBAI_API_KEY` env var.
Numeric voice ID. Default: `147320`.
Synthesis model. Default: `'mars-pro'`.
Output audio sample rate in Hz. Default: `24000`.
### close
```typescript theme={null}
close(): Promise
```
Release any resources held by the provider.
### closeEmitter
```typescript theme={null}
closeEmitter(): Promise
```
Close the emitter: drop all handlers and stop emitting. Waits up to 2 seconds
for in-flight async handlers to settle before returning.
### emit
```typescript theme={null}
emit(event: string, ...args: any[]): void
```
### getRuntimeConfig
```typescript theme={null}
getRuntimeConfig(): Record
```
### interrupt
```typescript theme={null}
interrupt(): Promise
```
Stop the current synthesis.
### listenerCount
```typescript theme={null}
listenerCount(event: string): number
```
### off
```typescript theme={null}
off(event: string, handler: EventHandler): void
```
### on
```typescript theme={null}
on(event: string, handler: EventHandler): EventHandler
```
### once
```typescript theme={null}
once(event: string, handler: EventHandler): EventHandler
```
### onFirstAudioByte
```typescript theme={null}
onFirstAudioByte(callback: FirstAudioByteCallback): void
```
Register a callback fired when the first synthesized audio byte is emitted.
### removeAllListeners
```typescript theme={null}
removeAllListeners(event?: string): void
```
### synthesize
```typescript theme={null}
synthesize(text: any, ..._extra: any[]): Promise
```
Synthesize and speak `text` on the active session.