Amazon: Amazon Polly Long-Form
Amazon Polly's premium engine for longer content such as news articles, training material and marketing video: text-embedding-driven emphasis, pauses and tone with six voices — four en-US (Danielle, Gregory, Ruth, Patrick) and two es-ES (Alba, Raul) — available in us-east-1 only, with full speech marks.
Providers
Different providers can host the same model. Choose one provider when you need a fixed backend, or let routing select among them.
Supported languages
en-US
es-ES
Voices
Features
Generates spoken audio from text input.
text_to_speech
SynthesizeSpeech (POST /v1/speech) takes the whole text up front and returns the finished audio as the HTTP response body.
synchronous
Upstream only: OutputFormat=json with SpeechMarkTypes returns NDJSON word, sentence, viseme and ssml marks instead of audio, billed at the same per-character rate.
speech_marks
6 voices across 2 language codes.
multilingual
Upstream only: StartSpeechSynthesisTask accepts up to 100,000 billed characters and writes the audio to an S3 bucket, which this platform does not expose.
async_long_text
Upstream only: up to five stored PLS lexicons (LexiconNames) apply per request when their language matches the voice.
pronunciation_lexicons
Code
ElevenLabs SDK streaming TTS
Routes the ElevenLabs SDK through allmodels and streams the audio response.
import { ElevenLabsClient } from "elevenlabs";
const client = new ElevenLabsClient({
apiKey: process.env.ALLMODELS_API_KEY,
baseUrl: "https://api.allmodels.io/el"
});
const stream = await client.textToSpeech.stream("voice_id", {
text: "I'm sorry, Dave. I'm afraid I can't do that.",
modelId: "amazon/amazon-polly-long-form",
outputFormat: "mp3_44100_128"
}, {
queryParams: {
provider: {
"only": [
"amazon"
]
}
}
});
const reader = stream.getReader();
for (;;) {
const { done, value } = await reader.read();
if (done) break;
// Write value to your response, file, or audio playback pipeline.
}