Pipecat Integration

Async delivers low‑latency, high‑fidelity text‑to‑speech (TTS) that plugs into Pipecat through our official integration.

Pipecat exposes two Async service classes:

Service class	Transport	Streaming
`AsyncAITTSService`	WebSocket (persistent)	Low-latency chunks
`AsyncAIHttpTTSService`	HTTP (per‑request)	Response streaming

AsyncAITTSService is recommended for interactive use because it streams audio chunks as soon as they are ready, minimising time‑to‑first‑byte (TTFB).

Prerequisites

Python 3.10 +

Pipecat 0.0.77 or later

Async account & API key

(Optional) preferred Async voice ID

Installation

Set your API key once:

Quick‑start (WebSocket)

Handling interruptions

AsyncAITTSService automatically stops synthesis on user interruption or when it receives a TTSUpdateSettingsFrame, enabling natural, back‑and‑forth voice experiences.

Troubleshooting

Symptom	Likely cause	Fix
ValueError: Missing ASYNCAI_API_KEY	Env var not exported	`export ASYNCAI_API_KEY=...`
Long TTFB (>1 s)	Using HTTP service / cold start	Switch to WebSocket & keep connection warm
ErrorFrame quota exceeded	Character quota exhausted	Upgrade plan

Next steps

📖 Read the Pipecat reference

🛠 Browse example code

Prerequisites#

Installation#

Quick‑start (WebSocket)#

Handling interruptions#