The computer on the left is only used for playing scanner sounds. Its sound output goes to the computer speakers inside the bore.
The computer on the right is for everything else. Its primary display is mirrored to the monitor mounted behind the bore. The secondary display (on the left) isn't seen by the subject. Its sound output goes to the subject's headphones.
The subject may listen to movies played on the right-side computer by wearing the big black headphones. Adjust headphone volume with the PHONES LEVEL knob on the mixer. To speak directly to the subject, hold the TALK TO CUE button while you speak into the mixer. Adjust the volume of your voice with the TALK LEVEL knob. There is a microphone attached to the subject's headphones. This allows the subject to be heard from the white speakers on the desktop. Troubleshooting: The CD/TAPE C and power buttons should be the only lighted buttons on the mixer. The gain knob on the black Rolls pre-amp should be turned all the way to the right. The “phantom” button on the Rolls pre-amp has no effect.
The QuickCam web camera is attached to the right-side computer and may be used to allow the subject to see your face. Access it from the QuickCam link on the desktop or from the “Logitech QuickCam” link under “My Computer”.
The four-button response pad is connected to a USB port on the right-side computer and should be accessible via E-Prime and Presentation.
Head motion is detected by the blue cube attached to the subject's headphones. To use this, double-click the “Head Motion Detector” link on the desktop and drag the program over to the left-hand monitor. Click the Start button when ready. When the subject's head motion exceeds the threshold, his or her video playback will be cut off for a short period of time. Click the +/- buttons at the top to adjust the cutoff threshold and the blackout duration.