Drone, Glitch and Noise: Making Experimental Music on iPads and iPhones (Apptronica Music App Series Book 1) by Clif Johnston [Kindle Edition].
"iPads and iPhones have found their way into the musical toolkits of many
producers, composers, artists, and DJs. While many of these musicians
use iOS devices to augment their existing music gear, for some, iPad and
iPhone apps have replaced instruments, computer-based DAWs, or studios
Experimental musicians realize that iOS music is one of the most
significant developments in the history of music. Multi-touch interfaces
open up a whole world of possibilities for interacting with music apps.
The small form factor of these lightweight devices allow them to easily
manipulated in three-dimensional space, while specialized sensors such
as accelerometers and gyroscopes enable apps to react to any type of
Far beyond mimicking traditional instruments, desktop software, or
hardware interfaces, the unique capabilities of iOS devices have enabled
the creation of whole new instruments. There are hundreds of apps
available today that offer ways of creating and interacting with music
that were inconceivable five years ago."