Sonic 3.5
Create voiceovers that sound like a person talking, in 42 languages, with real emotional range and near-instant turnaround. Give invideo’s agent your script and the read you want, and it prompts Sonic 3.5 the right way to achieve exactly that.
Why serious creatives choose Sonic 3.5
It sounds like a person talking, not a system reading
Sonic 3.5 delivers expressive, conversational speech: real pacing, real emotional range, a voice that reacts to what the words mean instead of reading past them. It even performs the nonverbal beats, a laugh, a sigh, a breath, the details that separate a person from a system.
It speaks 42 languages
From English, Spanish, and Japanese to Hindi, Tamil, Arabic, and Vietnamese, Sonic 3.5 delivers clean, natural speech across 42 languages, so one script can meet every audience you have in its own language.
It gets the hard words right the first time
Context-aware pronunciation handles the words that trip TTS up, read, bass, bow, and alphanumerics come out sounding human: order numbers, phone numbers, IDs, and emails spoken naturally in every language, with no preprocessing of the script.
It keeps up with how fast you work
Sonic 3.5 generates at sub-90ms latency, so a take arrives about as fast as you can ask for one. Ten reads of the same line cost you a minute, not a session.
The audio arrives clean
No artifacts to edit out, across every language and voice. What comes back is ready to sit in the cut.
How Sonic 3.5 works with invideo agents
On invideo, Sonic 3.5 runs inside an agentic workflow: hand the agent your script, describe the delivery, and takes come back at the pace of the conversation you are having. Here is what that looks like in practice.
You describe the delivery, the agent directs it.
Friendly but not salesy, slower on the disclaimer, brighter on the offer. The agent turns your direction into the instructions Sonic 3.5 performs from, so the read matches your intent without you touching a setting.
Takes come back at the speed of your notes.
Because a take lands in seconds, iterating is a conversation, not a queue: ask for warmer, hear warmer, ask for the alternate line, hear it now. You find the right read by listening, the way you would in a booth.
The voice stays with its speaker.
Approve a voice and the agent keeps it bound to your presenter or character in the project’s memory, attached to every line they speak from then on, in any of the 42 languages your project ships in.
You always stay in control.
You choose how the agent runs: generate every read on its own, check with you take by take, or walk you through each choice. Nothing ships that you have not heard and approved.
Who is Sonic 3.5 for?
Creatives making UGC and product ads.
Sonic 3.5 reads like a person recommending, not a script being performed, and it gets the commercial details right: prices, order numbers, and offer codes spoken clean, with no fix needed in the edit. Useful whether you are building UGC ads or performance ads.
Educators and explainer makers.
A lesson is a long read, and Sonic 3.5 stays natural through all of it, names and numbers pronounced correctly the first time, in 42 languages.
Movie trailer makers.
A trailer read is a performance, weight, pace, the pause before the title, and Sonic 3.5 delivers it with the emotional range the cut demands, at the speed you re-edit.
Helping creatives stay creative
Multiplayer mode
Collaborate in real time with live cursors to show what everyone's working on.
Storyboarding
Turn any script or idea into a shot-by-shot plan, then tweak as needed before generating.
Script writing
Write your script inside invideo, and ask an AI co-writer for help if you'd like.
Timeline editor
Picture Premiere Pro with full AI.
Build your own agents
Create custom agents to fill specific roles like cinematographer, music designer, and more.
From solo creatives to creative enterprises
World-class investors stand behind invideo.
Backed by the firms behind Stripe, Spotify, Flipkart, and ByteDance.
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Sonic 3.5 FAQs
What is Sonic 3.5?
Sonic 3.5 is one of the text to speech models on invideo agent's roster, Cartesia's latest, built for expressive conversational speech across 42 languages. You give the agent your script and the read you want, and it directs Sonic 3.5 to perform it.
How natural do the voices sound?
Sonic 3.5 on invideo agent sounds like a person talking, not a system reading. It carries real pacing and emotional range, reacts to what the words mean instead of reading past them, and performs the nonverbal beats: a laugh, a sigh, a breath. You describe the delivery you want and the agent directs the read until it lands.
What languages does Sonic 3.5 support?
42, and invideo agent can direct a read in any of them. English, Spanish, Japanese, Hindi, Tamil, Arabic, and Vietnamese are all there at native quality, so one script can meet every audience you have in its own language.
Does it pronounce names, numbers, and emails correctly?
Yes, and it is the strongest reason to reach for Sonic 3.5 on invideo agent. Context aware pronunciation handles the words that trip text to speech up, read, bass, bow, and speaks alphanumerics the way a person would: order numbers, phone numbers, IDs, and email addresses, in every language, with no cleanup of your script first.
Can I use Sonic 3.5 voiceovers in monetized content?
Yes. Voiceovers you generate with invideo agent are yours to use commercially, including in ads, client work, and monetized channels.
Do I need to learn Sonic 3.5's settings to use it on invideo?
No. You direct invideo agent in plain words, warmer here, slower on the disclaimer, brighter on the offer, and the agent turns that into the instructions Sonic 3.5 performs from. There are no settings to learn and no prompt to write, and nothing is final until you have heard it and approved it.