AI voices that
sound human.
603+ neural voices across 80+ languages. Paste text, pick a voice, hit generate — studio-quality audio in seconds. Transcribe audio, dub videos into any language, and download YouTube videos. All powered by your own Azure key.
Five pro-grade tools in one desktop app.
From narrating audiobooks to dubbing short films — Speech Studio handles your whole voice production pipeline.
Paste. Pick a voice. Hit generate.
Speech Studio's core feature is the cleanest TTS workflow you'll use on desktop. Drop a block of text, pick a voice from 603+ Azure neural options (including premium HD variants), adjust rate / pitch / style, and export to MP3 or WAV.
- 250,000 characters per input (Free), unlimited on Pro
- 603+ voices including standard and premium HD quality
- 80+ languages including Hindi, Chinese, Japanese, Arabic, and all major Latin-script languages
- Per-voice style selection (cheerful, serious, customerservice, narration, etc.)
- Prosody control: rate, pitch, volume with presets and custom values
- Full SSML editor with visual inserts for voice / style / prosody / language overrides
- Import from TXT, PDF, DOC, DOCX (Pro)
603+ voices. Filter, preview, pick.
The voice grid shows every Azure voice with gender, type (Neural / HD / MultiTalker), description, sample count, and a play-preview button. Filter by gender, language, country, or speaker name. Advanced filters for voice characteristics (bright, calm, friendly, etc.).
- Gender, language, country, personality filters
- Per-voice style samples (hear how it sounds saying “cheerful” vs “serious”)
- Premium HD variants — Azure's highest quality voices
- MultiTalker (e.g. Ava & Andrew) for multi-speaker dialogue
- Usage tracking — see which voices you use most
Live mic or audio file, any language.
Two input modes: live microphone (start / stop / pause) or file upload. Supports WAV, MP3, OGG, FLAC. Azure auto-detects language in most cases, or pick one from the list. Record the live session as MP3 or WAV alongside the transcript.
- Live mic transcription with real-time preview
- File upload: WAV, MP3, OGG, FLAC
- Quality presets: High (44.1kHz) and others
- Record mic input to file while transcribing
- Copy transcript to clipboard or export to text file
- 5 hours / month on Pro (BYOK Azure)
Turn one video into ten languages.
Pick source language, pick target language, hit Start Dubbing. Azure Video Translation handles transcription, translation, voice synthesis, and audio-video re-sync. The result is a new video where voices speak the target language — as if it were shot that way.
- Multi-stage pipeline: Upload → Translate → Generate → Download (visible progress per stage)
- Optional subtitle track in target language
- Requires: Azure Speech Service + Azure Blob Storage (guided setup)
- Preserves original video — output is a new file
- Pro feature (needs Pro/Premium license + your Azure resources)
URL in. File out. Up to 1440p.
Paste a YouTube URL, pick video or audio-only, choose your quality (up to 1440p), hit Download. Useful for feeding videos into Dub Video, extracting audio for podcasting, or saving content for offline use.
- YouTube + common video platforms
- Video output: up to 1440p
- Audio-only output: MP3 extraction
- Free tier: 2 downloads (counter visible in UI). Unlimited on Pro.
Every generation, logged.
Every TTS generation, transcription, dub, and improve-text call is logged with cost, voice, duration, and timestamp. Filter, search, re-run, or export. Keeps your Azure spend visible so there are no surprises.
- Transaction log with activity type (Speech, Transcribe, Dub, Improve)
- Cost in USD per row
- Sort by cost, voice, language, timestamp
- Re-run a past generation with one click
- Clear search / filter / delete entries
Don’t take our word for it. Listen.
These are Microsoft Azure’s neural voices — the same ones used by enterprises worldwide. Click any voice to hear a sample.
Ava HD
US English • Female
Jenny
US English • Female
Seraphina HD
German • Female
Aria
US English • Female
Sonia
UK English • Female
Natasha
AU English • Female
Aarav
Indian English • Male
Fatima
Arabic (UAE) • Female
Joana
Catalan • Female
Vlasta
Czech • Female
Christel
Danish • Female
Kalina
Bulgarian • Female
Tanishaa
Bengali • Female
Adri
Afrikaans • Female
Mekdes
Amharic • Female
Salma
Arabic (Egypt) • Female
16 of 603+ voices shown. Download Speech Studio to browse all.
Hear what multi-voice scenarios sound like
These were generated using Kaizen Speech Studio with multiple voices and SSML. Click to listen.
Family drama
Multi-character scene with emotional voice styles
Tech support call
Customer service voice style demonstration
Startup pitch
Professional narration with confident tone
Science fiction
Dramatic narration with atmospheric delivery
Customer feedback
Natural-sounding dialogue with two speakers
Teacher & student
Educational dialogue with clear enunciation
How it compares
We’re not ElevenLabs. We don’t pretend to be. Here’s where we fit.
| Kaizen Speech Studio | ElevenLabs | PlayHT | Murf AI | |
|---|---|---|---|---|
| Voice quality | Very good (Azure Neural + HD) | Best in class | Very good | Good |
| Emotional range | Styles (cheerful, serious, etc.) — good, not cinematic | Deep emotion, cloning | Good | Moderate |
| Free tier | 9 hours / month | 10 min / month | ~5 min / month | 10 min / month |
| Monthly cost after free | $0 (Azure free tier) or $49/yr for Pro | $5–$22 / month + credits | $31 / month | $23 / month |
| Voices | 603+ (Microsoft Azure) | ~30 + cloning | ~900 | ~200 |
| Languages | 80+ | 29 | 80+ | 20+ |
| SSML control | Full editor | Limited | ||
| Video dubbing | (Azure) | |||
| Transcription | ||||
| Desktop app | Windows | Web only | Web only | Web only |
| Data privacy | Keys stay local, your Azure account | Cloud-processed | Cloud-processed | Cloud-processed |
| Commercial use | Microsoft ToS |
If you need the absolute best emotional voices for character acting, ElevenLabs is hard to beat. But if you’re a YouTuber, audiobook creator, documentary narrator, or educator who needs natural, professional-quality voices without a monthly subscription that stacks with per-credit charges — Microsoft’s Azure voices are genuinely excellent, and 9 hours every month is genuinely free. We just built the best desktop wrapper for them.
Verify the free tier yourself: Azure Free Services — microsoft.com
Bring your own Azure. Keep your keys local.
Speech Studio connects to your own Azure Speech Service (and optional Blob Storage for video dubbing). We never see your key — it stays on your machine and is never uploaded anywhere.
Azure Speech Service
Required for TTS, transcription, and dubbing. Free tier = 9 hours/month of TTS.
8-step guideAzure Blob Storage
Only needed for Dub Video. Create a container, paste the connection string.
11-step guideFree is 9 hrs. Pro is unlimited.
Yearly for ongoing use, Lifetime for one-and-done. Both unlock Azure-key persistence, PDF/DOC imports, video dubbing, and the full SSML editor.
Free
- 9 hours TTS / month
- 603+ Azure voices
- 80+ languages
- 250k characters / generation
- 2 video downloads / month
- PDF/DOC import, video dub, SSML
Pro
- Everything in Free
- Unlimited TTS duration
- No character limit
- PDF / DOC / DOCX / TXT import
- Full SSML editor
- AI Video Dubbing
- Transcription 5 hrs / month
- Save your own Azure keys
- Unlimited video downloads
Lifetime
- Everything in Pro
- No renewals, ever
- Lifetime updates
- Transferable between your devices
- Priority support
Compare feature by feature.
| Feature | Free | Pro / Premium |
|---|---|---|
| Text-to-Speech (603+ voices) | 9 hrs / mo | Unlimited |
| Character limit per generation | 250,000 | Unlimited |
| File import (PDF / DOC / DOCX / TXT) | ||
| SSML editor | Read-only | Full |
| Transcription (STT) | 5 hrs / mo | |
| AI Video Dubbing | ||
| Video download | 2 / month | Unlimited |
| Save Azure keys locally | ||
| Priority email support |
Common questions
East US is the only supported region for Speech Studio's Azure integration. If you're in EU / Asia, your traffic still routes to East US but this adds ~100ms latency. We're working on multi-region support.Know first. Get more.
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