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What is Muse Voice Transcribe?

Muse Voice Transcribe marks Meta's first foray into the realm of real-time audio processing, delivering immediate automatic speech recognition (ASR), speaker identification, and endpointing features. This autoregressive multimodal model, a part of the Muse Spark series, evaluates audio snippets lasting 80 milliseconds and swiftly determines whether to continue listening or transcribe the spoken content into text. Its adaptive delay mechanism fine-tunes the audio context for each word based on the speech's complexity, thereby improving both transcription accuracy and response speed. The model is trained in over 70 languages, with 25 being thoroughly validated upon its launch, and it effectively manages arbitrary code-switching, enabling smooth transitions within and between sentences. Additionally, features for language, keyword, and contextual biasing significantly boost the model's ability to recognize particular names, locations, contacts, and specialized terminology. With its streaming diarization capability, the model adeptly identifies changes in speakers and can distinguish between over 20 different voices. The endpointing feature is also proficient at recognizing when speech begins and ends, contributing to a seamless interaction experience. As a result, Muse Voice Transcribe emerges as an innovative tool in speech recognition technology, cleverly combining advanced functionalities with ease of use while continuing to evolve based on user feedback and advancements in the field.

What is Grok Voice Think Fast 2.0?

Grok Voice Think Fast 2.0 is xAI’s flagship voice model for creating real-time AI assistants, phone agents, and interactive voice applications. The model is designed to stream both audio and text bidirectionally over WebSocket for low-friction conversational experiences. Developers can use it to build systems that listen, respond, reason, and adapt during live voice interactions. Grok Voice Think Fast 2.0 supports configurable system instructions so teams can shape behavior, persona, policies, and task handling. It also allows developers to choose high reasoning effort or no reasoning effort depending on latency, cost, and complexity requirements. The model supports built-in voices, custom voices, playback speed controls, automatic server-side voice activity detection, silence duration settings, idle re-engagement, and session resumption after temporary disconnects. It accepts PCM, G.711 μ-law, G.711 A-law, and Opus audio through JSON frames or raw binary frames. Configurable PCM sample rates let teams support use cases ranging from telephone-quality voice calls to 48 kHz audio workflows. Grok Voice Think Fast 2.0 supports more than 20 languages with native-quality accents, automatic language detection, natural responses in the speaker’s language, and seamless code-switching. Developers can provide language hints and up to 100 key terms to improve recognition of regional speech, names, products, codes, addresses, and specialized terminology. By combining real-time audio streaming, configurable reasoning, voice controls, multilingual support, transcription tuning, and pronunciation replacement, Grok Voice Think Fast 2.0 gives developers a flexible foundation for advanced voice AI products.

Media

Media

Integrations Supported

Grok
Grok Voice Agent
Grok Voice Agent Builder
Vercel AI Gateway

Integrations Supported

Grok
Grok Voice Agent
Grok Voice Agent Builder
Vercel AI Gateway

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided
Free Version
Free Trial Offered?

Pricing Information

Pricing not provided
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Meta

Date Founded

2004

Company Location

United States

Company Website

research.meta.ai/blog/introducing-muse-voice-transcribe

Company Facts

Organization Name

SpaceXAI

Date Founded

2023

Company Location

United States

Company Website

docs.x.ai/developers/model-capabilities/audio/speech-to-speech

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