Here’s a YouTube video demonstrating the use of the iPad as an MPC style drum pad device / MIDI control surface. This configuration uses a customized TouchOSC drum pad interface, and the iPad pads triggers a Redrum Drum Machine in Record+Reason. Buttons are also assigned for transport control and effect sends. TouchOSC sends open sound control messages through the wifi network to the host machine. Also running on the host machine is OSCulator, which acts as the OSC server and converts the messages to MIDI. Thanks to KB for the KIKBAK’s RAW MPC@+4dBv Vol.2 samples used in the Redrum.