@absolutejs/voice-lmnt

LMNT text-to-speech adapter for @absolutejs/voice.

Wraps LMNT's /v1/ai/speech/stream HTTP endpoint behind voice's TTSAdapter seam for fast, low-latency TTS using the aurora / blizzard / mochi models.

Install

bun add @absolutejs/voice-lmnt

@absolutejs/voice is a runtime dependency.

Use

import { voice } from "@absolutejs/voice";
import { lmnt } from "@absolutejs/voice-lmnt";

const app = voice({
  tts: lmnt({
    apiKey: process.env.LMNT_API_KEY!,
    voice: "lily",
    // optional:
    model: "aurora",            // default; or 'blizzard' / 'mochi'
    format: "raw",              // default; or 'mulaw' for telephony
    sampleRate: 24_000,         // default
    language: "en",             // 'auto' to detect
    speed: 1.0,
    temperature: 0.6,
    topP: 0.95,
    conversational: true,
  }),
});

For telephony at 8 kHz μ-law:

lmnt({ apiKey, voice: "lily", format: "mulaw" });

Options

| Option | Required | Default | Notes | | --- | --- | --- | --- | | apiKey | yes | — | LMNT API key, sent as X-API-Key. | | voice | yes | — | LMNT voice id. | | model | no | aurora | LMNT model id. | | format | no | raw | Must be raw (PCM s16le) or mulaw (telephony @ 8 kHz). mp3 / wav are rejected because they aren't streamable frame-by-frame. | | sampleRate | no | 24_000 | Ignored for mulaw. | | language | no | — | BCP-47-ish code, or auto. | | speed, temperature, topP, seed, conversational | no | — | Forwarded to LMNT. | | baseUrl | no | https://api.lmnt.com | Override for staging hosts. | | fetch | no | globalThis.fetch | Inject for tests; opportunistic HTTP/2 multiplexing on outbound HTTPS. |

Notes

• Whitespace-only send() is a no-op.
• session.close(reason) aborts in-flight requests and refuses further sends.
• This adapter uses LMNT's HTTP streaming endpoint. If you need their WebSocket transport, open an issue.