Two-Way Interpreting Setup

You speak your language and the other side hears the translation; they speak a foreign language and you see subtitles or hear the translation. This page walks through how to set it up, step by step. For the modes and background, see the Two-Way Call Interpretation Wizard.

How it works (one minute)

TransBox sends the translated read-aloud (TTS) to the output device you pick. Different devices give different results:

TTS output	Result
Headset / speakers	Only you hear the AI voice — use this to preview
Virtual cable input (CABLE Input)	The AI voice is sent into the virtual cable

A virtual cable has two ends: TransBox writes into CABLE Input, and your meeting or game reads from CABLE Output. So: in the voice settings of the meeting or game, set the microphone to CABLE Output, and the other side will hear the AI voice.

Step 1: Install the virtual sound card

The other side can only hear the translation through a virtual sound card. TransBox has a built-in installer for VB-CABLE (by VB-Audio, donationware):

1. Open Settings → Call interpretation and click Auto-configure virtual sound card / driver (or install from the official VB-CABLE page).
2. Grant administrator permission and click Install in the VB-Audio window.
3. Restart the PC after installation so the devices appear.
4. Back in Settings, click Re-detect. The virtual microphone and virtual speaker should show as ready.

Step 2: Configure TransBox

On the subtitle bar, click [Two-way call] to expand your speaking row:

1. Listen to the other side (inbound): set the audio source to the meeting app / game process, or "All system audio"; set the source and target languages; turn on Translation (optionally Source and Read aloud).
2. Your speech (outbound): click Two-way call, choose your physical microphone; set I speak → to your language and They hear → to theirs.
3. Output mode: choose Translated Voice (they hear the translation) or Original Voice (they hear your own voice, no translation). Ctrl+Shift+V switches between them.
4. Output device (the "Output:" dropdown):
   • First choose your headset/speakers, say a sentence, and confirm you can hear the translated voice (preview);
   • then switch to CABLE Input (VB-Audio Virtual Cable) so the voice is sent to the other side.
5. Click Save & Apply if you changed anything in Settings.

TIP

Preview with your headset first and switch to CABLE Input only for real use — once switched, you no longer hear your own read-aloud in the headset. To avoid echo, see FAQ Q3.

Step 3: Set up the app you talk in

Whether it is a game, Zoom, Tencent Meeting, or Discord, the rule is the same — set the microphone / input device to CABLE Output (VB-Audio Virtual Cable):

• Meeting apps: Audio settings → Microphone → CABLE Output. Zoom example:

  

• Games: in the game's audio / voice chat settings, find the voice chat input device / microphone and choose CABLE Output (menu names differ by game). VRChat example: Settings → Audio Options → Microphone, click Change input device and pick CABLE Output.

  

  

• Keep the speaker / output device on your headset — do not select CABLE there.

The Zoom and VRChat screenshots show the Chinese UI of those apps; the options are the same in other languages.

Step 4: Verify

1. Ask a friend in the meeting / game to confirm they can hear the translation.
2. Speak a sentence: the other side hearing the translation after about 2 seconds is normal — see FAQ Q13.
3. Let only TransBox use your physical microphone. If the meeting app also captures it, the other side will hear the original voice and the translation overlapping.

Troubleshooting

• The other side cannot hear you: check that the app's microphone is CABLE Output, TransBox's output device is CABLE Input, and the output mode is Translated Voice.
• Cannot hear teammates (games): see FAQ Q10.
• Echo / loop: do not point the read-aloud device at your own listening chain — see FAQ Q3.