Overview

Vocal Prism is a powerful, privacy-focused AI transcription tool for macOS that converts audio to text instantly and privately. Powered by OpenAI's Whisper model running entirely on your device with CoreML acceleration, your audio never leaves your Mac. Features real-time transcription with live waveform visualization, streaming output as audio is processed so you never have to wait. Supports multiple audio formats including MP3, WAV, M4A, and FLAC. Export transcripts as TXT files or copy to clipboard with one click for easy integration into meeting notes and documentation. Fully configurable with adjustable CPU threads and multiple model variants (Base, Small, Medium, Large) to balance speed and accuracy. Built natively with Swift and SwiftUI for smooth performance and zero Electron bloat. Features a stunning liquid-glass UI with dark mode support. Works completely offline with no cloud processing or subscription fees. Free and open-source software optimized for Apple Silicon (M1/M2/M3) using the Apple Neural Engine for lightning-fast transcription with minimal battery impact.

Minimum macOS: 26.0 (Tahoe)

Architecture: Apple Silicon, Intel

Key Features

• Real-time transcription: Watch audio turn into text instantly with streaming output
• Live waveform visualization for audio playback feedback
• Powered by OpenAI Whisper model running locally via CoreML
• Apple Neural Engine (ANE) acceleration for lightning-fast processing
• 100% local processing: Audio never leaves your Mac, completely private
• Works completely offline with no internet connection required
• Multi-format support: MP3, WAV, M4A, FLAC audio files
• Multi-language transcription support
• Export transcripts as TXT text files
• One-click copy to clipboard for easy sharing
• Configurable model variants: Base, Small, Medium, Large (balance speed vs accuracy)
• Adjustable CPU thread allocation for performance tuning
• Native macOS app built with Swift and SwiftUI
• Stunning liquid-glass UI design
• Dark mode support that adapts to system theme
• Drag-and-drop audio file import
• Zero Electron bloat - true native Mac experience
• Optimized for Apple Silicon (M1/M2/M3 chips)
• Minimal battery impact thanks to Neural Engine optimization
• Free and open-source software
• No subscription fees or cloud processing costs
• Works on both Intel and Apple Silicon Macs

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