Turn Written Copy into Natural Voice Audio
Last verified: July 28, 2026
A training lead updating an onboarding course can lose days to studio scheduling, pickups, and inconsistent takes. Text to Speech converts a finished script into spoken audio for explainers, product walkthroughs, learning content, accessibility narration, and conversational experiences.
Voice quality is only half the brief. If a project uses a voice associated with a real person, we recommend documenting consent, intended context, and disclosure before generation; authorized creative uses and deceptive digital replicas carry very different responsibilities.
Vidofy puts multiple speech models behind one interface; use the comparison below to match the voice profile to the brief.
Text to Speech at a Glance
A concise view of the mode's available inputs, output, and optional control coverage.
Active models available
5 generation models
Input type
text
Output media
audio clip
Audio generation
Not supported
Negative prompt support
Not supported
Seed / reproducibility control
Available on 1 of 5 models
Compare Text to Speech Models Side by Side
This like-for-like view covers the admin-curated active lineup: Speech 2.8 HD, Speech 2.8 Turbo, Speech 2.6 HD, Speech 2.6 Turbo, and Kokoro 1.0. Compare per-run credits, configured speed and quality profiles, text limits, and available controls.
| Feature | Speech 2.8 HD | Speech 2.8 Turbo | Speech 2.6 HD | Speech 2.6 Turbo | Kokoro 1.0 |
|---|---|---|---|---|---|
| Cost per run | 6 credits | 6 credits | 6 credits | 6 credits | 12 credits |
| Quality tier | premium | high quality | creative | creative | high quality |
| Speed tier | medium | fast | medium | medium | fast |
| Best-known strength | Sound-tag realism and studio clarity | Natural flow with a faster profile | Prosody and voice similarity | Value-focused multilingual delivery | Compact open-weight synthesis |
| Maximum text length | 5000 characters | 5000 characters | 5000 characters | 5000 characters | 7000 characters |
| Expression controls | Emotion, volume, speed | Emotion, volume, speed | Emotion, volume, speed | Emotion, volume, speed | Exaggeration, temperature |
| Audio output controls | Sample rate, bitrate, mono/stereo | Sample rate, bitrate, mono/stereo | Sample rate, bitrate, mono/stereo | Sample rate, bitrate, mono/stereo | Not listed in platform controls |
| Seed control | No | No | No | No | Yes |
Which Voice Profile Fits the Work
Fast high-quality iteration
Speech 2.8 Turbo is the strongest fit for repeated high-quality drafts: Vidofy lists it as fast, high quality, 6 credits, and ~20s. Kokoro 1.0 also carries a fast, high-quality profile at ~20s, but costs 12 credits; choose it when the longer text allowance or seed control matters more than per-run efficiency.
Premium narration and vocal detail
Speech 2.8 HD is the premium-profile choice at 6 credits and ~20s, with medium configured speed. Its creator highlights native sound tags and studio-grade clarity, making it the better starting point when subtle breaths, pauses, and polished narration matter. Speech 2.6 HD uses the same credits and expected runtime but shifts the platform profile toward creative delivery.
Creative delivery with different priorities
Speech 2.6 HD and Speech 2.6 Turbo share the same Vidofy configuration—6 credits, ~20s, medium speed, and a creative quality profile—so the choice is about emphasis rather than baseline operating limits. Creator documentation positions the HD option around similarity and ultra-high quality, while the Turbo option emphasizes value and low latency; test the same script in both and judge cadence against the intended audience.
Repeatable output and longer scripts
Kokoro 1.0 is the only featured option with seed control and accepts up to 7000 characters. Its Vidofy profile is fast and high quality at 12 credits and ~20s, while the creator model card describes a compact 82-million-parameter, open-weight, multilingual architecture. It is the practical choice when repeatability or a longer single input outweighs the higher run level.
Choose the Right Voice Profile for the Brief
Use this quick guidance to pick the best option for your workflow.
Recommendation: Start with Speech 2.8 Turbo for fast, high-quality iteration at 6 credits and ~20s. Move to Speech 2.8 HD for premium narration, choose Speech 2.6 HD when prosody and similarity lead the brief, test Speech 2.6 Turbo for value-oriented multilingual work, and use Kokoro 1.0 when seed control or the longer text allowance is decisive.
Match Each Script to a Different Speech Engine
Generate in the Browser, Not an API Project
Make Consent Part of the Production Brief
From Approved Script to Finished Speech
Prepare, choose, generate, and review the voiceover in four practical steps.
Step 1: Approve the words and voice use
Finalize the text, confirm pronunciation notes, and verify permission for any voice identity, attributed quotation, or sensitive context.
Step 2: Choose a generation profile
Select an available model and the voice or delivery controls exposed for it, based on the desired tone, quality, and consistency.
Step 3: Generate the audio
Submit the text so the selected engine can convert the written input into natural-sounding speech and produce audio output.
Step 4: Listen before publishing
Review names, numbers, pauses, emphasis, and disclosure language; revise the text and generate again if the delivery changes the intended meaning.
Voice Ethics Checklist Before You Generate
Verify the script, intended delivery, voice permissions, and publishing context before submitting the text.
Voice consent or ownership is unclear
Cause: The chosen voice may be associated with a real person, performer, employee, or brand representative.
Fix: Before you generate, verify documented permission, the approved use, the intended audience, and whether synthetic-output disclosure is needed.
Retry: Retry only after the voice owner or responsible rights holder has approved the defined context.
Names or acronyms may be mispronounced
Cause: The script contains uncommon names, abbreviations, symbols, heteronyms, or specialist vocabulary without enough context.
Fix: Before you generate, verify spoken spellings, expand ambiguous abbreviations, and place difficult words inside complete sentences.
Retry: Retry with a short pronunciation test before submitting the full script.
The pacing may feel rushed or flat
Cause: Sentences are uniformly long, punctuation is sparse, or important transitions are buried inside dense paragraphs.
Fix: Before you generate, verify sentence length, paragraph breaks, commas, dashes, and deliberate pauses around key ideas.
Retry: Retry after restructuring one passage at a time so you can identify which edit changed the cadence.
The delivery may conflict with the message
Cause: The selected voice profile or emotional direction does not match the audience, subject, or publishing context.
Fix: Before you generate, verify whether the script should sound reassuring, neutral, conversational, authoritative, restrained, or energetic.
Retry: Retry with one representative paragraph before producing the complete narration.
Frequently Asked Questions
What is Text to Speech?
It is a form of speech synthesis that converts written language into spoken audio. People use it for narration, learning materials, product guidance, accessibility, prototypes, announcements, and other situations where a script needs a consistent audible delivery.
How does AI text-to-speech work?
A synthesis engine processes the text, determines likely pronunciations and sentence structure, then generates a speech waveform with timing, pitch, pauses, and prosody. The selected engine and available controls influence how the final voice interprets the script.
What kind of text produces more natural speech?
Write for listening: use complete sentences, varied sentence lengths, clear punctuation, and explicit wording for dates, symbols, abbreviations, and difficult names. We recommend testing a representative paragraph before submitting a long script.
Who should use AI speech generation?
It can support educators, product teams, publishers, accessibility specialists, game writers, marketers, and conversational-interface designers. Common applications include audio content, voice assistants, e-book narration, learning experiences, and scripted dialogue.
How long does speech generation usually take?
Timing depends on the selected generation engine, script length, and platform demand. Review the comparison table for each featured option's configured expectation, then run a short sample when turnaround time is important.
Can I use generated speech commercially?
Commercial use is not a single yes-or-no question. Review the applicable platform and model terms, confirm rights in the source script, and consider consent or publicity rights if the voice depicts an identifiable person. Realistic synthetic audio can raise digital-replica issues separate from ownership of the written copy.
When should synthetic speech be disclosed?
Disclosure is advisable when listeners could reasonably mistake synthetic audio for a real person's statement or live interaction. Requirements depend on context and jurisdiction; in the United States, AI-generated outbound calls may fall under rules for artificial or prerecorded voices, including consent and identification requirements.
Which featured model is best for fast, high-quality narration?
Speech 2.8 Turbo is the more efficient starting point at 6 credits, an expected 20-second run, fast speed, and a high-quality profile. Kokoro 1.0 is also fast and high quality with the same expected runtime, but uses 12 credits; its 7000-character allowance and seed control can justify that difference for longer, repeatable work.
Which featured model suits premium narration versus creative delivery?
Speech 2.8 HD carries the premium profile, while Speech 2.6 HD and Speech 2.6 Turbo carry creative profiles. All three use 6 credits with an expected 20-second run, so test the same paragraph and judge pronunciation, cadence, emotional fit, and vocal detail.