Prompt
Female, elderly, raspy and playful, high theatrical energy, uneven pacing, mischievous tone, occasional cackling quality, suitable for fantasy comedy dialogue.
Prompt-built voices
Design reusable AI voices from a written brief.
Describe the role, tone, accent, pace, and delivery. Murmur generates a local preview after setup, then lets you save the best take to reuse in future scripts.
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Witch Bakery Owner
Text to preview
The croissants are fresh, the curses are mild, and the gingerbread man has stopped screaming.
Introducing Voice Design
Voice Design starts from a written role, not a recording. Describe who is speaking and how, and Murmur builds a voice from the sentence. No recording needed.
The voice stays in your workflow. Keep the take that works in My Voices and assign it again in scripts, batches, and projects, with generation running on your Mac.
- $49
- One time, for one computer
- 0
- Credits, tokens or per-word fees
- 10
- Languages in the Voice Design model
- 16 GB+
- Unified memory for the optional Voice Design model
Sample roles
Role voices from written prompts.
These are role voices for scenes, narration, and guides. They are not identity clones, and each one starts from a written brief you can adjust. Press play to hear one.
Female, elderly, raspy and playful, high theatrical energy, uneven pacing, mischievous tone, occasional cackling quality, suitable for fantasy comedy dialogue.
Witch Bakery Owner. A character voice for fantasy comedy dialogue.
A tired space-station radio operator with low-bandwidth texture, dry humor, clipped delivery, and a calm voice under pressure.
Indie Game Radio Operator. A game character with dry humor and a clipped delivery.
A clear startup product host with confident pacing, light energy, precise articulation, and a friendly but not salesy delivery.
Startup Product Host. A guide for product walkthroughs and explainers.
A grounded documentary field narrator with soft authority, natural pauses, warm close-mic texture, and a calm observational tone.
Documentary Field Narrator. Calm narration for documentary scenes.
Neutral gender, adult-sounding, smooth robotic voice, very slow pace, soothing tone, precise articulation, unintentionally funny literal delivery, suitable for wellness comedy.
Luxury Spa Robot. A slow, literal robot voice for wellness comedy.
Workflow
From brief to saved voice. One local workflow.
- 01
Describe the role, age range, accent, tone, pacing, texture, and where the voice will be used.
- 02
Move from vague direction like "friendly host" to a specific brief with delivery and use-case details.
- 03
Keep the preview that works, then reuse that role voice in scripts, batches, and projects.
Voice brief Draft
A retired radio host with a smoky baritone, dry humor, and slow confident pacing. Warm, cinematic, and good for long-form narration.
Preview line
Tonight, the city sounds quieter than usual. That is usually when the interesting stories start.
- Role
- course instructor
- Texture
- warm, lightly raspy
- Pacing
- measured, not sleepy
- Delivery
- clear technical explanation
- Use
- lesson narration
- Length
- short preview first
Warm course instructor with lightly raspy texture, measured pacing, and clear technical delivery.
- Course GuideLesson introReady
- Radio OperatorGame dialogueAssigned
- Warm NarratorChapter 04Ready
- Ad ReadLaunch clipDraft
Before you design
A few good questions.
Still wondering? Talk to the maker.
Is Murmur Voice Design the same as voice cloning?
No. Voice Design starts from a written role and speaking direction. It is for creating reusable production voices, not copying a specific person's identity.
Does Voice Design run locally?
After the model is installed, generation runs on your Mac inside Murmur, so scripts and previews stay in your local workflow.
What should I write in a voice prompt?
Describe the role, age range, accent, tone, pacing, texture, and where the voice will be used. Murmur includes prompt recipes so you do not have to start from a blank box.
Can I reuse a designed voice?
Yes. Save the best preview to My Voices and assign it again in scripts and projects.
Does Voice Design work on Windows?
The Windows beta can design a voice from a written description with Qwen3-TTS Voice Design and Breeze TTS 2. Saving designed voices to My Voices and reusing them across projects is part of the Mac app for now. See Murmur for Windows for the current beta feature list.
Build a role voice once. Reuse it in Murmur.
Buy Murmur for $49Download free for Apple Silicon (3-day Pro trial)Intel Mac? Download here.Not sure? Apple menu > About This Mac shows your chip.
Free to download, Pro free for 3 days · 7-day refund · macOS 15+ on Apple Silicon or Intel · Windows 10/11 beta