Connect EFX to any input source, like the devices built in microphone, an external keyboard or guitar (iPad soundcard needed) or to your favorite iOS drum machine or synthesizer via Inter-App Audio or Audiobus. Or import a soundfile into the app and alienate it with with up to 4 different effects at the same time!
– Multi-effect app created by the developers of Elastic Drums
© © Oliver Greschke
Source: Apps Galore