new to construct and need some help getting a knob to set the volume of a track. How do i get the the know to stay within angles and adjust the volume to the attached audio accorindly. The image has the current angles i want to stay between. Right now it just goes in complete circles when i touch the knob.
<img src="http://i.stack.imgur.com/FpeGz.jpg" border="0" />
Thanks