AI Voiceovers in Seconds: Generate Professional Audio with Text-to-Speech
Create studio-quality voiceovers, narrations, and audio content using ImageLayer's TTS generation powered by Google Gemini. Eight distinct voices, two models, one widget.
Professional voiceover is expensive. Industry rates often land between roughly one hundred and five hundred dollars per minute depending on talent, usage rights, and turnaround. For product demos, landing pages, and marketing clips, that cost pushes many teams toward stock music, silent walkthroughs, or skipping audio altogether.
Text-to-speech has crossed a threshold. Early TTS sounded unmistakably synthetic. Today’s models can deliver pacing, emphasis, and tone that listeners accept as near-human, especially for explainers and short-form narration. ImageLayer brings that capability into the same embeddable widget developers already use for branded visuals: Gemini 2.5 Flash Preview TTS for fast, economical output, and Gemini 2.5 Pro Preview TTS when you want richer delivery. You can keep the result as standalone MP3/WAV or attach the same read to a completed video through the built-in voiceover flow.
Available Voices
ImageLayer exposes eight voices with distinct styles so you can match brand tone without re-recording:
| Voice | Style | Gender |
|---|---|---|
| Kore | Firm | F |
| Puck | Upbeat | M |
| Charon | Informative | M |
| Aoede | Breezy | F |
| Sulafat | Warm | F |
| Achird | Friendly | M |
| Leda | Youthful | F |
| Sadaltager | Knowledgeable | M |
Use Kore or Charon for confident product and instructional reads. Puck, Aoede, and Leda skew toward lighter, energetic content. Sulafat and Achird suit approachable brand stories. Sadaltager works well for educational or thought-leadership scripts where authority matters without sounding stiff.
Step-by-Step: Product Voiceover
Goal: A polished product pitch you can use as a standalone file or merge onto a finished hero video or in-app tour.
Configuration:
- Mode: Audio
- Model: Gemini 2.5 Flash TTS
- Voice: Kore
Prompt (paste as-is):
Meet Prism — the smart lamp that transforms any room into your personal sanctuary. With its brushed aluminum design and color-shifting ambient glow, Prism adapts to your mood, your music, your moment. From warm amber for focused work to soft violet for evening relaxation, every shade is effortlessly beautiful. Prism. Light the way you feel.
Output: 30 seconds, MP3, 1 credit.
Generated result: Prism voiceover — Kore voice, Gemini 2.5 Flash TTS
Flash TTS keeps latency and cost predictable while Kore’s firm delivery keeps the copy sounding like a deliberate product story, not a generic assistant read. If you already have a finished demo clip, this same script can be submitted from Add voiceover on the video preview to get back a merged MP4.
Step-by-Step: Brand Narration
Goal: A short brand narrative for a hero section, podcast intro bumper, or social clip.
Configuration:
- Voice: Charon
Prompt (paste as-is):
Every cup tells a story. At NovaCraft, we source single-origin beans from the highlands of Colombia, Ethiopia, and Guatemala — then roast them in small batches to unlock flavors you have never experienced. Rich. Complex. Unforgettable. NovaCraft. Crafted for the curious.
Output: 25 seconds, MP3, 1 credit.
Generated result: NovaCraft narration — Charon voice, Gemini 2.5 Flash TTS
Charon’s informative tone carries origin and process detail without sounding like a lecture. The em-dash and short closing lines give the model natural places to breathe.
Flash vs Pro: When to Use Which
Gemini 2.5 Flash Preview TTS is optimized for speed and cost efficiency: 1 credit per generation in the flows above. Use it for rapid iteration, UI copy, internal demos, and most marketing narrations where clarity beats cinematic polish.
Gemini 2.5 Pro Preview TTS costs 2 credits and trades a bit of speed for richer intonation and more natural pauses—the kind of nuance listeners notice in longer listens. Reach for Pro when you need podcast-quality pacing, emotionally varied reads, or scripts where awkward phrasing would undermine trust.
Rule of thumb: Flash for quick narrations and high-volume updates; Pro when the audio is the centerpiece and you want maximum expressiveness per sentence.
Pro Tips: Writing Scripts That Sound Good on TTS
LLM-based TTS follows punctuation and wording more closely than older rule-based systems. A few habits improve results:
- Use pauses explicitly. Ellipses (
...) and em-dashes (—) signal hesitation and clause breaks. Periods shorten rhythm; commas keep clauses flowing. - Avoid unexplained abbreviations. Spell out “API,” “CEO,” or product codes unless your audience always hears them as letters—TTS may guess wrong.
- Spell out numbers that matter for clarity (“twenty-five percent” vs. “25%” depending on context), especially in formal or international-facing content.
- Keep sentences conversational. Short clauses and one idea per sentence reduce run-on delivery. Read the script aloud once; if you stumble, the model might too.
Keep exploring
- Generate AI Podcast Snippets: From Script to Audio in One Click — Multi-voice podcast formats and step-by-step runs.
- Add AI Voiceovers to Generated Videos: The Complete Workflow — Add narration to a finished video and download a merged MP4.
- Launch an AI Podcast Brand: Cover Art, Intro, and Episodes — All Generated — Wavelength brand package across image, video, and audio.
Try It in the Playground
The fastest way to compare voices and models is hands-on. Open the playground at /playground/, switch to Audio mode, and audition the same script across Kore, Charon, Flash, and Pro. Once you find a combination that fits your product, wire the same settings through ImageLayer’s widget API so generated audio stays consistent across pages and environments.