We have noticed that a lot of people have been searching for how to loop panning in GarageBand so here is a video to show you your options. Basically, what we bet you are looking for is a tremolo effect. The tremolo effect, when set correctly, can pan sound between the left and right channel. If you are in a situation where you’d like to have a very specific panning pattern that is rather uneven, you can automate your panning pattern with “Automation”. See the video below!