WhatA desktop app that transcribes audio from any source playing on your computer — meetings, YouTube videos, podcasts, lectures — using local models with no cloud dependency.
SignalA user explicitly requests the ability to play a speech video and have it transcribed locally, and the developer acknowledges this should work but it currently requires routing system audio through the microphone, which is a clunky workaround that breaks with headphones.
Why NowVirtual audio drivers and system audio capture APIs have improved on macOS (especially with macOS Sequoia's screen sharing audio), and local models are now accurate enough to make real-time system audio transcription practical without cloud APIs.
MarketStudents, researchers, journalists, and professionals who transcribe meetings and media; overlaps with the $30B+ transcription market (Otter.ai, Rev, Descript). Gap: no polished local-only tool captures system audio natively.
MoatCombining virtual audio routing with local transcription in a seamless UX is a non-trivial systems engineering problem that creates a quality moat; adding features like speaker diarization and chapter markers deepens it.
Show HN: Ghost Pepper – Local hold-to-talk speech-to-text for macOSView discussion ↗ · Article ↗ · 419 pts · April 6, 2026
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