Source: https://ailoot.ai/models/en/speech-02-hd/ Canonical: https://ailoot.ai/models/en/speech-02-hd/ Language: en # speech-02-hd [Markdown](https://ailoot.ai/models/en/speech-02-hd/index.md) · [JSON](https://ailoot.ai/models/en/speech-02-hd/facts.json) ## [speech-02-hd](https://ailoot.ai/models/en/speech-02-hd/) Speech-02 HD is a speech synthesis model focused on audio quality and voice similarity. - [**Ailoot · Text to speech** `POST /v1/audio/speech` `speech-02-hd`](https://ailoot.ai/models/en/speech-02-hd/#method-0) About the model This description covers the model’s capabilities. Available in Ailoot inputs, outputs and options are listed for the selected method below. #### A voice for narration and long-form reading Speech 02 HD creates speech with an emphasis on quality, rhythm and vocal consistency. The manufacturer highlights narration and audiobooks, where a voice needs to retain its character and move smoothly through extended text. This is a synthesis model: it accepts text and converts it into speech audio. #### Connecting text and timbre The Speech 02 family is based on an autoregressive Transformer architecture and a trainable speaker encoder. Timbre extraction and speech generation were trained jointly to align vocal characteristics with content. Family capabilities include use of prepared cloned voices and combinations of language, accent and pronunciation style. #### Emotion and multilingual reading Emotional coloration can be inferred from the text's meaning or set manually. Joy, sadness, anger, fear, disgust, surprise and calm are available. The model works with Russian, English and other languages; the manufacturer describes various English accents, Chinese and Cantonese, Japanese, Korean, European and other languages. The current Speech 02 description specifically excludes Persian, Filipino and Tamil. The general language list of newer Speech generations should not automatically be applied to this version. #### Voice settings Synthesis provides voice selection, speed changes of **0.5–2**, volume above 0 and up to **10**, and pitch from **−12 to 12**. A pronunciation dictionary can replace written forms with the desired reading; phonetic notation and Japanese pronunciation variants are supported. This helps control how names and ambiguous words sound. #### Pauses and finished audio The manufacturer allows pauses lasting **0.01–99.99 seconds** between spoken passages. Pause duration is specified to two decimal places; markers are placed between spoken passages and not consecutively. Text for a single synchronous request must contain fewer than **10,000 characters**. Audio can be received in full or incrementally; streaming output is recommended for text exceeding 3000 characters. Model formats include MP3, WAV, FLAC and PCM; general synthesis settings also describe Opus and G.711 μ-law variants. Mono or stereo can be used. Text-to-speech is available in this card, while separate voice preparation and extended settings apply only within the supported access method through Ailoot. Additional audio settings include sample rates of **8, 16, 22.05, 24, 32 and 44.1 kHz**. MP3 provides bitrates of **32, 64, 128 or 256 kbps**. Voice coloration can also be changed and one effect applied: spacious echo, hall echo, telephone sound or a robotic voice. Voice-modification effects are supported for MP3, WAV and FLAC when receiving the audio in full, and only for MP3 when streaming. G.711 μ-law formats use an 8 kHz sample rate. These capabilities belong to MiniMax's synthesis settings. The manufacturer provides speech-text synchronization: sentence timestamps, word timestamps or word timestamps during incremental output. This result helps align speech with displayed text. This additional capability requires support for the corresponding response format. **Ailoot · Text to speech** `POST /v1/audio/speech` `speech-02-hd` [`speech-02-hd`](https://ailoot.ai/models/en/#m=speech-02-hd&route=Core&caller=speech-02-hd&fmt=speech) MiniMax /`speech-02-hd` ### Overview Speech-02 HD is a speech synthesis model focused on audio quality and voice similarity. Accepted inputs Text Results speech ### Available in Ailoot · inputs & methods **Ailoot · Text to speech** `POST /v1/audio/speech` Input types `text` Output types `speech` Output format mp3 | Field | Type | Requirement | Values & limits | Default | | --- | --- | --- | --- | --- | | Field`model` | Type`string` | RequirementRequired | Values & limits speech-02-hd | Default— | | Field`input` | Type`string` | RequirementRequired | Values & limits Minimum length: 1 Maximum length (exclusive): 10,000 Unit: Unicode characters | Default— | | Field`voice` | Type`string` | RequirementRequired | Values & limits Pattern: ^\[A-Za-z0-9\_-\]{1,128}$ | Default— | | Field`response_format` | Type`string` | RequirementOptional | Values & limits mp3 | Default— | Input material combinations **text\_to\_speech** · Required: input Method parameters and lifecycle | Parameter | Contract | | --- | --- | | Parameter`material_types` | Contracttext | | Parameter`required` | Contractnull | | Parameter`optional_controls` | Contractnull | Lifecycle: `synchronous_result_then_owned_library` `GET /v1/media/tasks/{task_id}` · actual returned task\_id or media library record `GET /v1/media/assets/{asset_id}/content` `GET /v1/media/assets` `GET /v1/media/assets/{asset_id}` Method shapes and IDs are exact; supplier capability is separate from admission. ### Pricing #### Ailoot method rates Input $100.00 *per 1 million characters* Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/) ### Example requests #### Ailoot · Text to speech Speech example ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" : "${AILOOT_TEXT_FILE:?Set your actual UTF-8 narration script}" export AILOOT_TEXT_FILE : "${AILOOT_VOICE_ID:?Set the actual accepted voice ID for this model}" export AILOOT_VOICE_ID python3 - <<'PY_REQUEST' import json,os from pathlib import Path p=json.loads('{"model": "speech-02-hd", "input": ""}') f=Path(os.environ["AILOOT_TEXT_FILE"]) if not f.is_file():raise SystemExit("Choose your actual UTF-8 source material") text=f.read_text(encoding="utf-8") if not text.strip():raise SystemExit("Source material must contain text") p["input"]=text import re voice=os.environ["AILOOT_VOICE_ID"] if not re.fullmatch(r"[A-Za-z0-9_-]{1,128}",voice):raise SystemExit("Set an actual accepted voice ID") p["voice"]=voice Path("request.json").write_text(json.dumps(p,ensure_ascii=False)) PY_REQUEST curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/audio/speech \ -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \ --data-binary @request.json -D response-headers.txt -o speech.mp3 ``` ### Receive and save results #### Ailoot · Text to speech mp3 - `GET /v1/media/tasks/{task_id}` - `GET /v1/media/assets/{asset_id}/content` - `GET /v1/media/assets` - `GET /v1/media/assets/{asset_id}` ##### Keep all completed results Keep every complete returned response, file and content part. Keep the complete binary result and headers. If JSON/multiple outputs are returned, retain every data item and fetch each actual signed asset URL. ##### If the original response needs checking Retain original operation\_id/X-Client-Request-ID for reconciliation without resubmission; no dedicated audio poll route. Response fields | Field | Type | | --- | --- | | Field`binary audio` | Typebytes | | Field`response headers` | Typeheaders | Errors and next steps | Response | Condition | Next step | | --- | --- | --- | | Response400 · `invalid_request_error` | ConditionInvalid required fields, material representation or parameter value | Next stepCorrect the indicated fields before a new creation request. | | Response`server_error` | ConditionThe returned response says the operation or result requires a check | Next stepKeep the original returned operation/task ID, request headers and response; continue supported reads of that original operation. Do not resubmit the creation request. | ### Aliases #### Model aliases **Ailoot** [`speech-02-hd`](https://ailoot.ai/models/en/#m=speech-02-hd&route=Core&caller=speech-02-hd&fmt=speech) #### Method path aliases Use the method paths shown above. #### Related caller IDs [`speech-02-hd`](https://ailoot.ai/models/en/#m=speech-02-hd&route=Core&caller=speech-02-hd&fmt=speech) FAQ · speech-02-hd What inputs and results are available? `POST /v1/audio/speech` · `speech-02-hd`: `text` → `speech` Which fields does the request use? `POST /v1/audio/speech` · `speech-02-hd`: `model`, `input`, `voice`, `response_format` Connect Ailoot to Claude Code, OpenCode, Hermes or your own app. ## The company and its project portfolio The company and its project portfolio: millions of customers; monthly sales in the billions. ## Buy tokens at a discount. Subscription discounts for regular use. Promo codes offer up to 50% off token purchases. Subscription Choose a discounted plan for your regular requests. 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