IntermediateUpdated Dec 14, 2025
Text-to-Speech & Voice Cloning
Create natural-sounding speech and clone voices from audio samples for personalized voice synthesis.
JL
Jordan Lee
Platform Engineer
8 min read
Introduction
Text-to-speech (TTS) has evolved dramatically. Modern AI voices are nearly indistinguishable from humans, and voice cloning lets you create custom voices from short samples.
Basic Text-to-Speech
python
from abstrakt import AbstraktClient
client = AbstraktClient()
result = client.run("fal-ai/text-to-speech", {
"input": {
"text": "Hello! Welcome to Abstrakt, the AI platform for developers.",
"voice": "alloy"
}
})
print(f"Audio URL: {result.audio.url}")Available Voices
| Voice | Style | Best For |
|---|---|---|
| alloy | Neutral | General purpose |
| echo | Male | Narration |
| fable | Expressive | Storytelling |
| onyx | Deep | Announcements |
| nova | Female | Assistants |
| shimmer | Warm | Conversations |
Voice Selection
python
# Professional narration
{"voice": "onyx", "text": "Welcome to our quarterly report..."}
# Friendly assistant
{"voice": "nova", "text": "Hi there! How can I help you today?"}
# Storytelling
{"voice": "fable", "text": "Once upon a time, in a land far away..."}Controlling Speech
Speed Control
python
{
"input": {
"text": "This is spoken at normal speed",
"speed": 1.0 # 0.5 to 2.0
}
}
# Slower for clarity
{"speed": 0.8}
# Faster for efficiency
{"speed": 1.2}SSML Support
python
{
"input": {
"text": '''
<speak>
<p>This is a paragraph with a <break time="500ms"/> pause.</p>
<p>This word is <emphasis level="strong">emphasized</emphasis>.</p>
</speak>
''',
"format": "ssml"
}
}Voice Cloning
Clone a voice from an audio sample:
python
# Step 1: Upload reference audio
clone_result = client.run("fal-ai/voice-clone", {
"input": {
"reference_audio_url": "https://example.com/voice-sample.mp3",
"name": "custom_voice"
}
})
voice_id = clone_result.voice_id
# Step 2: Use cloned voice
speech = client.run("fal-ai/text-to-speech", {
"input": {
"text": "This is my cloned voice speaking!",
"voice_id": voice_id
}
})Voice Cloning Requirements
- Audio length: 10-30 seconds ideal
- Quality: Clear, minimal background noise
- Format: MP3, WAV, M4A
- Content: Natural speech, not singing
Batch Audio Generation
python
async def generate_audiobook(chapters):
audio_urls = []
for chapter in chapters:
result = await client.run_async("fal-ai/text-to-speech", {
"input": {
"text": chapter["content"],
"voice": "fable"
}
})
audio_urls.append({
"title": chapter["title"],
"url": result.audio.url
})
return audio_urlsOutput Formats
python
# MP3 (default, smaller files)
{"output_format": "mp3"}
# WAV (higher quality)
{"output_format": "wav"}
# OGG (web optimized)
{"output_format": "ogg"}Best Practices
- Keep segments short - Break long text into paragraphs
- Use punctuation - Helps with natural pacing
- Test voices - Different voices suit different content
- Quality samples - Better input = better clone
- Review output - AI can mispronounce unusual words
Next Steps
- Create AI music
- Set up webhooks for long audio
- Learn batch processing
#audio#text-to-speech#voice-cloning#tts