StimTracker has a built-in voice key feature. It monitors the participant’s voice level continuously, and generates an event marker when the level rises above a threshold that you specify (see Using StimTracker).

Any PC-compatible microphone can be plugged into the Mic jack in the back of StimTracker.

This first generation StimTracker does not produce output via USB. Consequently, voice key information can be sent out only as a TTL signal. The newer StimTracker Quad can deliver voice info as both TTL and via USB.