Can't use noise gate in Garageband 10
HI! After browsing the web and this community, I have found that Garageband 10 does include a noise gate. đ However, I can't understand the directions for turning it on. I can see the place where I would put a check mark, with the slider next to it, but both are greyed out. I can't make a check mark in the box. From conversations elsewhere on the board, it seems I might not have the plug-in for the noise gate correctly installed. Can anyone help me install it so that I can use it? I'm trying to convert a very old audiotape with a lot of echo and background noise, and the noise gate would certainly help! Maybe not as much as the equalizer, which I've also used, but I do think I need both. I'm working on the library macbook, a 13-inch gGZ running Mavericks.
Here's what I'm looking at when I try to check the box for the noise gate:
I think you can see the place where I should check the box is greyed out. In any case, it's completely unresponsive when I try to click in it. Can anyone explain how I get this to work? Thanks in advance!