Circle Of Fifths

Circle Of Fifths lets you play chords by tapping on fields in the circle of fifths. It synthesizes guitar sounds on the fly; no canned samples are used. Under the hood, the libpd audio engine physically simulates six strings with the Karplus-Strong algorithm.

If you are set up for Android development, you can check out the source code of Circle Of Fifths and more at https://github.com/libpd.