This video captures a discussion by Peter Brinkmann at droidcon 2013 on Music on Mobile Devices, focusing on MIDI and libpd.
Here’s what Brinkmann has to say about his presentation:
Over the past few years, libpd has become one of the leading audio synthesis engines for mobile devices, powering innovative apps such as NodeBeat, Pugs Luv Beats, and Inception: The App. I will present a brief introduction to libpd as a scripting language for audio, with special emphasis on prototyping and workflow. I will also touch upon two related projects, MIDI support for Android (over USB and Bluetooth) as well as an ongoing effort to establish best practices for Android audio development.