Self Troubleshoot before proceed any further.
Please include the test result when resorting for email support.
1.Is "USB PnP Audio Device" seen by your Windows or Mac or is recognized as unknown device?
For the latest Windows users, in order to access the sound setting, please right-click the speaker icon at the bottom right-choose "Sound"-click "Sound Control Panel" at the upper right of the pop-up window.
2.If computer sees it as unknown device, have you test out on a different computer? Tried to update and reinstall the unknown driver for a few times on the same computer?
3.If it's recognized, is what you want to do is to hear mic playthrough you computer speaker? (Enabling system monitoring feature on Windows or using Quicktime Player on Mac).
🔔4.To get the best sounding out of T732, which is defaulted to 100% input volume, we highly recommend to low down the level to below 50% through the computer audio setting.
Windows: Right-click the speaker icon at the bottom right-choose "Sound"-click "Sound Control Panel" at the upper right of the pop-up window-"Recording Devices"-right-click "USB PnP Audio Device"-"Level".
Mac: Click the Apple icon at the upper left-"System Preferences"-"Sound"-"In"-"Input Volume".