Voice Cloning Quickstart: Your First Cloned Voice

The fastest path to a working cloned voice: a short sample, a consent record, one create call, and you are synthesizing in the new voice.

Cloning requires the speaker’s consent. You will pass a consent record with a full name and email on the create call.

Set your API key

$ export SPEECHIFY_API_KEY="your-api-key-here"

Record a sample

Capture 10-30 seconds of clean speech, under a minute and under 5MB. Avoid background noise.

Create the voice

POST

/v1/voices

1 curl -X POST https://api.speechify.ai/v1/voices \
2      -H "Authorization: Bearer <token>" \
3      -H "Content-Type: multipart/form-data" \
4      -F avatar=@<file1> \
5      -F consent="string" \
6      -F gender="male" \
7      -F name="string" \
8      -F sample=@string

Try it

Keep the voice_id from the response.

Synthesize

Pass the voice_id to the speech endpoint:

POST

/v1/audio/speech

1 curl -X POST https://api.speechify.ai/v1/audio/speech \
2      -H "Authorization: Bearer <token>" \
3      -H "Content-Type: application/json" \
4      -d '{
5   "input": "Hello! This is the Speechify text-to-speech API.",
6   "voice_id": "geffen_32",
7   "audio_format": "mp3",
8   "model": "simba-3.2"
9 }'

Try it

Response

1 {
2   "audio_data": "example",
3   "audio_format": "wav",
4   "billable_characters_count": 10,
5   "speech_marks": {
6     "chunks": [
7       {}
8     ],
9     "end": 1,
10     "end_time": 1,
11     "start": 1,
12     "start_time": 1,
13     "type": "example",
14     "value": "example"
15   }
16 }

Cloned voices work self-serve on simba-3.0, simba-english and simba-multilingual. simba-3.2 serves them as a limited release enabled per workspace — contact Speechify to have it enabled — and is English only, so a non-English clone returns 400 there.

Next steps

Voice Cloning API

Required fields, model support, and voice management.

Overview

Concepts and quality tiers for voice cloning.