User`s manual

V 1 P R O F E S S I O N A L 5 . 7

Impact Trigger Options

To access the Trigger Options window, launch the V1, select

Options

and then the

Trigger

tab. You will see this window:

Using this window, you may specify the size of the buffer (in seconds) used to capture

the video. Golf swings typically can be represented adequately in a 3 second time

window. Other motions may require varying amounts of time. Each second of video

will consume approximately 3½ megabytes (MB) of your computer’s RAM memory (7

megabytes for dual-camera mode). If your system has only 128MB RAM, for example,

it may be impractical (more likely impossible) to capture 15 seconds of video in dual-

camera mode. If your hard drive runs continuously while doing a triggered recording

or video becomes excessively choppy, you may be experiencing a low-RAM situation.

The “impact at” setting allows you to graphically specify the point of impact within the

captured video files. In a 3 second golf swing, about 1 second should be allocated to

“follow through”—so that leaves 2 seconds as the impact position within the video. In

other words, the difference between the buffer size and the Impact Position

determines the amount of time that the V1 will continue to record following receipt of

the impact trigger (either from an audio hit detector or a mouse click).

When performing a triggered recording, you may specify the impact position (and end

the recording) by clicking the mouse on the live video window. If the

Enable

box is

checked, the V1 will also listen to the camcorder or computer’s microphone for the

sound of impact (the sound of the club or bat hitting a ball, for example).

You may choose to use either your camcorder microphone, your computer’s built-in

microphone or an external microphone by selecting the appropriate device in the drop-

down boxes.

There are two parameters which affect the audio trigger. The first is the microphone

Sensitivity

. The default sensitivity is 50%, but this may be adjusted lower if you are

picking up false triggers, or higher if the V1 is missing some impacts. The second is

the

Frame offset

parameter. Very often, due to computer hardware and driver

latencies and buffering, the computer microphone’s audio and the capture card’s video

may not be in perfect synchronization. The

Frame offset

parameter allows you to add