I am using an Alesis IODock II with my third-gen iPad. The KMA's MIDI in/out goes to the MIDI ports of the IODock while the audio outputs of the IODock go into the KMA. I can use either the internal speakers of the KMA or the headphone jack to monitor the combined audio of the KMA and IPad music apps. Luckily the IODock II fits on the KMA's music stand nicely.