How much audio is needed to clone a voice in Voicebox?

Voicebox can clone a target voice from as little as three seconds of audio, which can be provided via upload, microphone, or system capture.

Does Voicebox work with AI coding agents?

Yes, it includes an MCP server that exposes a voicebox.speak tool, allowing agents like Claude Code, Cursor, and Cline to speak in cloned voices.

What hardware requirements does Voicebox have?

It runs inference on Metal, CUDA, ROCm, Intel Arc, or DirectML, but requires a capable GPU for larger Whisper and TTS models.

Is Voicebox available as a cloud service?

No, Voicebox is a desktop-only application for macOS, Windows, and Linux, and does not offer a hosted or cloud option for non-GPU users.

Voicebox

Open-source desktop voice studio for local cloning, dictation, and giving MCP agents a voice.

Free· Free and open source; optional $VOICEBOX token donationsAudioMulti-model (Chatterbox, Qwen TTS, Whisper, etc.)7.4 / 10

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In short

Voicebox is a local-first desktop studio that bundles voice cloning, Whisper dictation, and multi-engine TTS. It is best for developers who want to give MCP agents like Claude Code a custom voice using their own GPU.

Best for

Pick Voicebox if you want a local, open-source voice studio that handles cloning, dictation, and giving MCP coding agents a voice — all on your own GPU.

Skip if

Skip it if you need a hosted API, lack a capable GPU, or want studio-grade TTS quality on par with mature commercial vendors.

Voicebox is an open-source desktop app (macOS, Windows, Linux) that bundles voice cloning, multi-engine TTS, Whisper-powered dictation, and an MCP server into one local-first package. It clones a target voice from as little as three seconds of audio (upload, mic, or system capture), runs inference on Metal, CUDA, ROCm, Intel Arc, or DirectML, and exposes a voicebox.speak tool so Claude Code, Cursor, Cline, and other MCP-aware agents can talk back in voices you own.

It pitches itself directly as a free, local alternative to ElevenLabs and WisprFlow, and the feature surface backs that up: seven TTS engines, a Stories timeline editor for multi-voice narratives, an audio effects pipeline (pitch, reverb, delay, compression) with per-profile defaults, generations up to 50,000 characters with auto-chunking and crossfades, and a global push-to-talk dictation pill that drops cleaned transcripts into any app. A local LLM (Qwen) optionally scrubs ums and self-corrections without rephrasing.

Voicebox is free and open-source, with a GitHub repo and an associated $VOICEBOX donate/token angle. Beyond MCP it also exposes a POST /speak HTTP endpoint for ACP, A2A, shell scripts, and custom harnesses. The catch is that it's a desktop-only workflow that wants real GPU horsepower for the larger Whisper and TTS models, and the celebrity-voice presets it ships with raise the usual ethical and consent questions around cloning real people.

Editor's take

Voicebox is one of the more ambitious local-first voice projects we've seen — cloning, dictation, MCP agent speech, and a stories editor in one open-source desktop app. It's early (v0.2.0) and leans hard on your hardware, but the MCP integration alone makes it worth a look for anyone living in Claude Code or Cursor.

— The AI Tool Bible editorial team

Pros

✅ Fully local inference on Metal, CUDA, ROCm, Intel Arc, or DirectML
✅ Clones a voice from as little as 3 seconds of audio
✅ MCP server lets Claude Code, Cursor, Cline speak in cloned voices
✅ Bundles seven TTS engines, Whisper dictation, and a multi-track editor
✅ Open source with Mac, Windows, and Linux builds

Cons

⚠️ Desktop-only — no hosted/cloud option for non-GPU users
⚠️ Quality scales with local hardware; small models trade fidelity
⚠️ Shipped celebrity voice presets invite obvious consent concerns
⚠️ Young project (v0.2.0) with rough edges likely

Use cases

voice-cloningtext-to-speechdictationagent-voicesmulti-voice-narration

Frequently asked

How much audio is needed to clone a voice in Voicebox?: Voicebox can clone a target voice from as little as three seconds of audio, which can be provided via upload, microphone, or system capture.
Does Voicebox work with AI coding agents?: Yes, it includes an MCP server that exposes a voicebox.speak tool, allowing agents like Claude Code, Cursor, and Cline to speak in cloned voices.
What hardware requirements does Voicebox have?: It runs inference on Metal, CUDA, ROCm, Intel Arc, or DirectML, but requires a capable GPU for larger Whisper and TTS models.
Is Voicebox available as a cloud service?: No, Voicebox is a desktop-only application for macOS, Windows, and Linux, and does not offer a hosted or cloud option for non-GPU users.