"BluesMachine" app for iPhone and iPad

BluesMachine is a multi-touch guitar-like user interface for 12-bar Blues improvisation.

Explaining MULTI-TOUCH: BluesMachine can sound up to 2 improvisation notes at the same time.

Explaining GUITAR-LIKE USER INTERFACE: BluesMachines Blues scale is derived from the one on the guitar fingerboard. But (and this is an important point) notes out of the scale are not accessible.

Explaining 12-BAR BLUES IMPROVISATION: You will improvise over a 12-bar Blues accompaniment of (optionally) bass and drums, whose chord progression you can select from a list of 3 very classic ones.

Controls:

Key: 12 options, from C to B.
Tempo: from 60 BPM to 140 BPM.
Turnarounds: from 0 (which means just one series of 12 bars) to 9.
Chord progression: 3 options available.
Bass: switch turn-on / turn-off.
Drums: switch turn-on / turn-off.
To learn about the BluesMachines blues scale, click the apps info button.

BluesMachine is a small version of a project presented as Talk & Poster at the SIGGRAPH 2009 conference in New Orleans.