It's a pretty simple module; I mainly use it to create four polyphonic voices. I like that it also includes a summed output, which comes in handy when creating chord stabs. Additionally, you can prewire related modules—such as the A-105-4 and A-141-4—using jumper cables on the back. This is especially useful, as polyphonic patching can get quite wire-heavy. If you're looking for that kind of setup, it's worth noting that the internal connections are bypassed automatically when you insert a jack into one of the CV inputs.