Release EchoSub 1.0.0 · mPhpMaster/echo-sub

EchoSub shows live, translated captions for anything your PC plays — videos, streams, calls, games. It listens to your speakers, recognizes speech in almost 100 languages, translates it on your own GPU, and shows it in a customizable always-on-top caption box, with a line and a color for every speaker.

This is the first public release.

Download

EchoSub-Setup-1.0.0.exe (971 MB) — Windows 10/11, 64-bit

SHA-256: 08F8392301E3E4658C80C1830DE90C8ADCE4098AC4CB119411F34A20145A6226

Run the installer (no admin rights needed; you can also install for all users).
Start EchoSub. The first start downloads the AI models (~2.5 GB) in a progress window — you can cancel and it resumes later.
Play anything with speech. Right-click the caption box or the tray icon for the menu.

Windows SmartScreen: the installer isn't code-signed yet, so Windows may show "Windows protected your PC". Click More info → Run anyway. You can verify the file with the SHA-256 above: Get-FileHash EchoSub-Setup-1.0.0.exe.

Highlights

Any app, any language — WASAPI loopback capture, Whisper large-v3-turbo recognition with automatic language detection (~100 languages).
On-device translation — NLLB-200 (600M / 1.3B), or Google Translate. The original text appears instantly and the translation follows a moment later.
Speakers — each voice gets its own line and color.
Arabic — Moroccan Arabic (Darija) support and optional diacritics (تشكيل).
Caption box your way — fonts, colors and spacing for original and translation, language labels with flags, 9 screen positions or drag anywhere, autosize, corner radius, padding, and smooth slide / fade animations.
Handy — global hotkeys (Ctrl+Alt+H / P / L), caption history and transcripts, click-through lock, auto-hide when nobody talks, self-recovery when an audio device disappears.