Rime TTS

Arcana and Mist model families via Rime’s HTTP endpoint.

Rime TTS

RimeTTS targets the Rime HTTP endpoint. Both Arcana (high fidelity) and Mist (low latency) model families are supported. The provider requests audio/pcm and yields raw PCM_S16LE chunks at the configured sample rate.

Install

npm install getpatter

No vendor SDK is required — RimeTTS uses the platform fetch, so it works on Node 18+.

Usage

import { RimeTTS } from "getpatter";

const tts = new RimeTTS();                                            // reads RIME_API_KEY
const tts2 = new RimeTTS({ model: "arcana", speaker: "astra" });

In an agent:

// npx tsx example.ts
import { Patter, Twilio, DeepgramSTT, RimeTTS } from "getpatter";

const phone = new Patter({ carrier: new Twilio(), phoneNumber: "[phone]" });

const agent = phone.agent({
  stt: new DeepgramSTT(),                             // DEEPGRAM_API_KEY from env
  tts: new RimeTTS({ model: "arcana", speaker: "astra" }),  // RIME_API_KEY from env
  systemPrompt: "You are a helpful assistant.",
});

await phone.serve({ agent });

Mist v2 — low-latency, streaming-friendly:

const fast = new RimeTTS({
  model: "mistv2",
  speaker: "cove",
  speedAlpha: 1.1,
  reduceLatency: true,
});

Options (selection)

Option	Default	Notes
apiKey	—	Reads from RIME_API_KEY when omitted.
model	"arcana"	"arcana" or any mist* model.
speaker	"astra" / "cove"	Default depends on model.
lang	"eng"	Rime language code.
sampleRate	16000	Hz.
temperature, topP, maxTokens, repetitionPenalty	—	Arcana only.
speedAlpha, reduceLatency, pauseBetweenBrackets, phonemizeBetweenBrackets	—	Mist only.
baseUrl	Rime /v1/rime-tts	Override for proxying or self-hosted gateways.