Superb delay + for live and recording
This app is great for realtime manipulation of vocals for live use. I use with iPad2 and Alesis I/O Dock and love the fast and easy x/y surface for adjusting parameters on the fly. Echo Pad also adds dimension to synth–apps within AudioBus on many of my tracks. This is a great app for just standard Delay but also has so many other ways to really come up with an original and unique sound of your own.
Update: since iOS8 the app can get a bit glitchy and occasionally even locks up becoming unresponsive, then must be closed and restarted. However this seems to only happen with the random function that can stack many effects at once, so for live use one must keep it fairly simple with no more than three effects used at a time. This is likely just a limit of the processing power of iPad2, so I will not take off any stars because this is still a great tool for sound manipulation. It is past time to upgrade my hardware anyway.
Nitpick Pete about
Echo Pad - Multi Effects Processor