Garage band needs Filter Automation!
It really needs cut off and resonance filter pads! Each for each track or marked tracks. Without the filters garageband for iPad is plainly plain. A music making app without filter pads, and that's even featured in the app stores' "THE WHOLE STUDIO" thing. And it's the only app there. Even apps like music studios have a filter pad. Even the lite version does!
GarageBand (iPad), iOS 6.1.4