Text To Speech

Sieve’s TTS (Text-to-Speech) app is designed for developers seeking a single interface to state-of-the-art multilingual speech synthesis capabilities. It integrates with the best text-to-speech models from OpenAI, Cartesia, and ElevenLabs while also providing a universal interface to common pre/post processing options useful for text-to-speech applications.

Key Features

• Voice Cloning: Zero-Shot voice cloning with a ~3 second reference audio.
• Pretrained Voices: Multiple pretrained voices ranging from soothing, narration to enthusiastic commercial voices encompassing a wide-range of regional accents.
• Emotional Control: Intuitive control over emotions in the speech.
• Pacing Control: Helps you control the speaking rate of the speech.
• Broad Range of Languages: Support for over 50+ popular languages.
• Return Timestamps: Return timestamps of the generated audio.

Pricing

When using this application, you will by-default be billed at-cost of the selected voice engine.

Using your own API keys

If you have your own API keys for the voice engines, you can enter them in our Secrets section to be billed at your own rate.

Voice Engine	$ / 1000 characters	Secret Name
OpenAI (non-HD)	$0.015	OPENAI_API_KEY
OpenAI (HD)	$0.03	OPENAI_API_KEY
Cartesia	$0.05	CARTESIA_AI_API_KEY
ElevenLabs	$0.18	ELEVEN_LABS_API_KEY

Feature Details

Stability & Similarity

These parameters work with elevenlabs and will be ignored if the voice engine selected is cartesia or openai. Read more about them here.

Emotional Control

You can control emotions of the spoken audio using the emotion param for any cartesia voice.

• Speaker: cartersia-commercial-lady
• Text: Hello, this is commercial lady here to show you how you can control emotions with the sieve API!

Normal	Anger	Curiosity
Positivity	Surprise	Sadness

Meet the Voices

Elevenlabs

Name	Description	Sample
🇺🇸 Rachel	Middle age American female voice.
🇫🇷 Darine	Middle age female French voice. Perfect for Informative & Educational content.
🇫🇷 Maxime	Young French male voice. Perfect for Social Media.
🇪🇸 Gabriela	A middle-aged female Spanish voice. Jovial and fresh, ideal for tutorials on social media.
🇪🇸 Alberto	Adult Spanish male voice, serious tone, ideal for narrations.

OpenAI

Name	Description	Sample
🇺🇸 Alloy	Middle Age female American voice. Perfect for documentary narrations.
🇺🇸 Echo	Middle Age Male American voice. Best for narrations and YouTube tutorials.
🇬🇧 Fable	British Middle Age Female voice. Best for audiobooks and narrations.
🇺🇸 Onyx	Middle Age Male American voice. Best for audiobooks and storytelling.
🇺🇸 Nova	Middle age American female. Refreshing and energetic.

Cartesia

Name	Description	Sample
🇯🇵 Japanese Man Book	This voice is deep and even, perfect for narrational content in Japanese.
🇩🇪 German Conversational Woman	This voice is rich and friendly, perfect for casual conversations in German.
🇺🇸 Reflective Woman	This voice is even, full, and reflective, perfect for a young narrator for an audiobook or movie.
🇺🇸 Ted	This voice is clear and calm, perfect for a call center.
🇪🇸 Spanish Narrator Lady	This voice is calm and reflective, perfect for a Spanish audiobook narrator.
🇺🇸 Friendly Reading Man	This voice is energetic and friendly, like having your friend read his favorite book to you.
🇺🇸 Sweet Lady	This voice is sweet and passionate, perfect for a character in a game or book.
🇺🇸 Nonfiction Man	This voice is smooth, confident, and resonant, perfect for narrating educational content.
🇺🇸 Commercial Lady	This voice is inviting, enthusiastic, and relatable, perfect for a commercial or advertisement.
🇨🇳 Chinese Commercial Man	This voice is enthusiastic and deep, suited for commercials and advertising in Chinese.
🇺🇸 British Customer Support Lady	This voice is friendly and polite, with a British accent, perfect for phone conversations.
🇺🇸 Commercial Man	This voice is upbeat and enthusiastic, perfect for commercials and advertisements.
🇺🇸 Teacher Lady	This voice is neutral and clear, perfect for narrating educational content.
🇺🇸 Friendly Sidekick	This voice is friendly and supportive, designed for voicing characters in games and videos.
🇺🇸 Tutorial Man	This voice is inviting and calming, perfect for tutorials.
🇺🇸 ASMR Lady	This voice is calming and soft, perfect for guided meditations and soothing content.
🇨🇳 Chinese Woman Narrator	This voice is neutral and deliberate, perfect for narrating stories and educational content in Chinese.
🇺🇸 Midwestern Woman	This voice is neutral and deliberate, with a midwestern accent, suitable for news broadcasts and narration.
🇺🇸 Sportsman	This voice is energetic and enthusiastic, perfect for a sports broadcaster.
🇺🇸 Storyteller Lady	This voice is neutral and smooth, with a slight Canadian accent, perfect for narrations.
🇫🇷 French Conversational Lady	This voice is gentle and smooth, perfect for casual conversations in French.
🇫🇷 French Narrator Lady	This voice is velvety and neutral, suited for narrating content in French.
🇫🇷 French Narrator Man	This voice is even and rich, perfect for narrating content in French.
🇫🇷 Stern French Man	This voice is gravelly and assertive, designed for voicing stern characters.
🇩🇪 German Storyteller Man	This voice is smooth and deliberate, perfect for narrating stories in German.
🇩🇪 Friendly German Man	This voice is friendly and inviting, perfect for casual conversations in German.
🇩🇪 German Reporter Woman	This voice is neutral and even, perfect for narrating news stories in German.
🇩🇪 German Conversation Man	This voice is rich and earnest, perfect for conversations and customer support in German.
🇵🇹 Friendly Brazilian Man	This voice is lively and inviting, perfect for a casual conversation in Portuguese.
🇩🇪 German Woman	This voice is warm and smooth, perfect for a phone conversation in German.
🇺🇸 Southern Belle	This voice is friendly and inviting, with a slight Southern Accent, perfect for conversations and phone calls.
🇺🇸 California Girl	This voice is enthusiastic and friendly, perfect for a casual conversation between friends.
🇺🇸 Reading Man	Male with calm narrational voice..
🇺🇸 British Reading Lady	This is a calm and elegant voice with a British accent, perfect for storytelling and narration.
🇺🇸 British Narration Lady	This is a neutral voice with a British accent, perfect for narrations .
🇺🇸 Wise Man	This is a deep and deliberate voice, suited for educational content and conversations.
🇺🇸 Announcer Man	This voice is deep and inviting, perfect for entertainment and broadcasting content.
🇺🇸 Doctor Mischief	This is an expressive character voice, suited to whimsical characters for games and educational content.
🇺🇸 Anime Girl	This voice is expressive and has a high pitch, suitable for anime or gaming characters.
🇺🇸 Wise Guide Man	This voice is deep and deliberate, perfect for inspiring and guiding characters in games and videos.
🇺🇸 The Merchant	This voice is playful and quirky, designed for character work in games and videos.
🇺🇸 Madame Mischief	This voice is mischeivious and playful, suitable for voicing characters for kids' content and games.
🇫🇷 Calm French Woman	This voice is soft and calm, suited for soothing conversations in French.
🇺🇸 New York Man	This voice is compelling and husky, with a New York accent, perfect for sales pitches and motivational content.
🇺🇸 New York Woman	This voice commands authority, with a New York accent, perfect for a commanding narrator or character.
🇺🇸 Female Nurse	This voice is clear and firm, perfect for nurse characters and instructional videos.
🇺🇸 Laidback Woman	This voice is laid back and husky, with a slight Californian accent.
🇺🇸 Alabama Male	This voice has a strong Southern Accent, perfect for conversations and instructional videos.
🇺🇸 Midwestern Man	This voice is neutral and smooth, with a slight midwestern accent, perfect for narrations.
🇺🇸 Kentucky Man	This voice is laidback and smooth, with a Kentucky accent, perfect for a casual conversation.
🇯🇵 Japanese Children Book	This voice is young and expressive, perfect for character work in games and videos.
🇺🇸 Kentucky Woman	This voice is energetic and upbeat, with a slight Kentucky accent, perfect for speeches and rallies.
🇨🇳 Chinese Commercial Woman	This voice is upbeat and smooth, perfect for commercials in Chinese.
🇯🇵 Japanese Male Conversational	This voice is clear and confident, perfect for a Japanese call center agent .
🇯🇵 Japanese Woman Conversational	This voice is gentle and friendly, perfect for casual conversations in Japanese.
🇵🇹 Brazilian Young Man	This voice is soothing and warm, good for both narrations and conversations in Portuguese.
🇪🇸 Spanish Narrator Man	This voice is even and deliberate, perfect for narrating educational content in Spanish.
🇫🇷 Helpful French Lady	This voice is helpful and cheery, like you're talking with a friend in French.
🇨🇳 Chinese Female Conversational	This voice is friendly and inviting, perfect for casual conversations in Chinese.
🇨🇳 Chinese Call Center Man	This voice is polite and neutral, perfect for phone conversations and customer support agents in Chinese.
🇩🇪 German Reporter Man	This voice is energetic and deliberate, perfect for a German narrator or broadcaster.
🇫🇷 Friendly French Man	This voice is friendly and calm, perfect for French customer support agents .
🇵🇹 Pleasant Brazilian Lady	This voice is pleasant and clear, perfect for casual conversations in Portuguese.
🇺🇸 Salesman	This voice is smooth and persuasive, perfect for sales pitches and phone conversations.
🇺🇸 Customer Support Lady	This voice is polite and helpful, perfect for customer support agents.
🇺🇸 Australian Male	This voice is smooth and disciplined, with an Australian Accent, suited for narrating educational content.
🇺🇸 Australian Woman	This voice is deliberate and confident, with a slight Australian accent, perfect for inspiring characters in videos and stories.
🇺🇸 Indian Customer Support Lady	This voice is clear and polite, with an Indian accent, suitable for customer support agents.
🇺🇸 Indian Lady	This voice is young, rich, and curious, perfect for a narrator or fictional character.
🇺🇸 Confident British Man	This voice is disciplined with a British accent, perfect for a commanding character or narrator.
🇺🇸 Middle Eastern Woman	This voice is clear with a Middle Eastern Accent, perfect for a narrator.
🇺🇸 Yogaman	This voice is calm, soothing, and stable, perfect for a yoga instructor.
🇺🇸 Movieman	This voice is deep, resonant, and assertive, perfect for a movie narrator.
🇺🇸 Wizardman	This voice is wise and mysterious, perfect for a Wizard character.
🇺🇸 Southern Man	This voice is warm with a Southern accent, perfect for a narrator.
🇺🇸 Pilot over Intercom	This voice sounds like a British Pilot character speaking over an Intercom.
🇺🇸 Reading Lady	This voice is monotone and deliberate, perfect for a slower-paced and more serious reading voice.
🇺🇸 Classy British Man	This voice is light and smooth with a British accent, perfect for casual conversation.
🇺🇸 Newsman	This voice is neutral and educational, perfect for a news anchor.
🇺🇸 Child	This voice is young and full, perfect for a child.
🇺🇸 Maria	This voice is laid back, natural, and conversational, like you're catching up with a good friend.
🇺🇸 Barbershop Man	This voice is smooth and relaxing, perfect for a casual conversation.
🇺🇸 Meditation Lady	This voice is calm, soothing, and relaxing, perfect for meditation.
🇺🇸 Newslady	This voice is authoritative and educational, perfect for a news anchor.
🇺🇸 1920's Radioman	This voice is energetic and confident, great for an entertainer or radio host.
🇺🇸 British Lady	This voice is elegant with a slight British accent, perfect for storytelling and narrating.
🇺🇸 Hannah	This voice is neutral and calm, perfect for a call center.
🇺🇸 Wise Lady	This voice is wise and authoritative, perfect for a confident narrator.
🇺🇸 Calm Lady	This voice is calm and nurturing, perfect for a narrator.
🇺🇸 Indian Man	This voice is smooth with an Indian accent, perfect for a narrator.
🇺🇸 Princess	This voice is light, freindly and has a flourish, perfect for character work in videos and games.

Supported Languages

Supported Languages	elevenlabs	openai	cartesia
🇺🇸 English (USA)	✅	✅	✅
🇬🇧 English (UK)	✅	✅
🇦🇺 English (Australia)	✅	✅
🇨🇦 English (Canada)	✅	✅
🇯🇵 Japanese	✅	✅	✅
🇨🇳 Chinese	✅	✅	✅
🇩🇪 German	✅	✅	✅
🇮🇳 Hindi	✅	✅
🇫🇷 French (France)	✅	✅	✅
🇨🇦 French (Canada)	✅	✅
🇰🇷 Korean	✅	✅
🇧🇷 Portuguese (Brazil)	✅	✅	✅
🇵🇹 Portuguese (Portugal)	✅	✅
🇮🇹 Italian	✅	✅
🇪🇸 Spanish (Spain)	✅	✅	✅
🇲🇽 Spanish (Mexico)	✅	✅
🇮🇩 Indonesian	✅	✅
🇳🇱 Dutch	✅	✅
🇹🇷 Turkish	✅	✅
🇵🇭 Filipino	✅	✅
🇵🇱 Polish	✅	✅
🇸🇪 Swedish	✅	✅
🇧🇬 Bulgarian	✅	✅
🇷🇴 Romanian	✅	✅
🇸🇦 Arabic (Saudi Arabia)	✅	✅
🇦🇪 Arabic (UAE)	✅	✅
🇨🇿 Czech	✅	✅
🇬🇷 Greek	✅	✅
🇫🇮 Finnish	✅	✅
🇭🇷 Croatian	✅	✅
🇲🇾 Malay	✅	✅
🇸🇰 Slovak	✅	✅
🇩🇰 Danish	✅	✅
🇮🇳 Tamil	✅	✅
🇺🇦 Ukrainian	✅	✅
🇷🇺 Russian	✅	✅
🇿🇦 Afrikaans		✅
🇦🇲 Armenian		✅
🇦🇿 Azerbaijani		✅
🇧🇾 Belarusian		✅
🇧🇦 Bosnian		✅
🇨🇦 Catalan		✅
🇪🇪 Estonian		✅
🇪🇸 Galician		✅
🇮🇱 Hebrew		✅
🇭🇺 Hungarian		✅
🇮🇸 Icelandic		✅
🇮🇳 Kannada		✅
🇰🇿 Kazakh		✅
🇱🇻 Latvian		✅
🇱🇹 Lithuanian		✅
🇲🇰 Macedonian		✅
🇲🇷 Marathi		✅
🇳🇿 Maori		✅
🇳🇵 Nepali		✅
🇳🇴 Norwegian		✅
🇮🇷 Persian		✅
🇷🇸 Serbian		✅
🇸🇮 Slovenian		✅
🇸🇹 Swahili		✅
🇵🇭 Tagalog	✅	✅
🇹🇭 Thai	✅	✅
🇵🇰 Urdu	✅	✅
🇻🇳 Vietnamese		✅