Translate Desktop Audio in real-time (Twitch / YouTube / Netflix / Zoom / Discord)

The trick is to route your computer’s sound output into a virtual microphone input and set that as the default mic before opening TalkPersona's live translator page.

Windows (VB-Audio “VB-CABLE”, free)

Install once

1. Download VB-CABLE (search: VB-CABLE download VB-Audio, or directly visit https://vb-audio.com/Cable/ , download the zip file).
2. Unzip, Right-click VBCABLE_Setup_x64.exe → Run as administrator → Install Driver → Reboot (if asked).

Set up (VB-CABLE)

1. Open Windows Settings (Win + i) → System → Sound.
2. Under Output, select CABLE Input (VB-Audio Virtual Cable) and set it as Default - This routes the computer audio output to the VB cable input.
3. Under Input, select CABLE Output (VB-Audio Virtual Cable) and set it as Default - This routes the computer audio output through the VB cable back to computer's virtual microphone input.
4. As the computer audio output is routed away, you need this step so that you can hear the video like before: Control Panel → Sound → Recording tab → double-click CABLE Output → Listen tab → Check ✔ Listen to this device → choose your speakers/headphones → Apply.
5. Close and re-open Chrome/Edge (or close tabs using the mic), open TalkPersona's live translator page, click Start Listen.
6. Play your Twitch/YouTube/Netflix/Zoom/Discord audio—translation should appear in real time.

macOS (BlackHole – free)

Install once

1. Install BlackHole (search: BlackHole audio driver) and follow its installer.

Set up (BlackHole)

1. Open Audio MIDI Setup (Spotlight).
2. Create a Multi-Output Device with BlackHole + your speakers/headphones (so you can hear audio).
3. Set System Output to that Multi-Output Device.
4. In System Settings → Sound → Input, select BlackHole as your input (the “mic”).
5. Restart Chrome/Safari, open the translator, press Start Listen, then play your stream/video.

Troubleshooting

• No transcription? Ensure the virtual device is the default mic (Sound Input) before opening the translator page; allow mic in the browser (address-bar icon).
• Can’t hear the video? Enable Windows “Listen to this device” (Control Panel → Sound → Recording → CABLE Output → Properties → Listen) or use headphones / Multi-Output on macOS.
• Still picks up your voice instead of computer audio? Another app may be holding the mic; close Zoom/Meet/Discord mic inputs and all browsers, and reload the translator page.
• Mobile devices: iPhone/Android browsers can’t capture other apps’ audio this way—use a computer.

Revert / Uninstall

• Windows: set your real mic and real speaker back as default (Windows Settings → Sound → Input and Output). If desired, uninstall VB-CABLE (Control Panel → Programs) and reboot.
• macOS: set your usual input/output back; follow BlackHole’s uninstall steps if you wish.

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Why this is needed: browsers’ built-in speech engine listens to the system’s default microphone. A virtual cable makes your desktop audio appear as a virtual microphone, set it as the default sound input, so the translator can “hear” computer audio stream.