How to mute selected region of a clip?

To mute a selected region of a clip in a project:

Select the region you want to mute by dragging the cursor while holding down the left mouse button. You should have a yellow rubber band around the portion you want to mute. You can adjust this further by grabbing the handles on either side of the yellow rubber band.

Now, select Edit/Split Clip. Your one clip should have become three clips. Select the one that you want to mute. Click the audio icon and set the volume to zero.

No way I know of to reduce the whistle within iMovie. You can share your movie and open it up in a Garageband project. There, you can do editing on the audio track with all the GarageBand Tools.

how does that mute a region!? It doesn't... does no-one actually know how to mute a bloody region.. it's such a simple **** function in all other music software yet it doesn't work in Garageband, which is suppose to be a simple music recording product.... I am so sick of wasting my time with software that doesn't work in a bloody logical manner... main arrange window, region of track selected, nothing will mute it, a rubber band only works in piano roll which is of no use and doesn't seem to work anyway.

You are in the iMovie Discussion Group and my answer was referring to iMovie.

If you have a GarageBand problem, there is a discussion group for that, with plenty of knowledgeable people there.

I see what to do. You go into Edit and then hit "split clips" but it won't let me select "Split clips".