KDDI's au design project creates cellphones that double as instruments

KDDI's au design project has churned out plenty of interesting cellphone concepts over the years, and it looks like its latest batch is no exception, with it enlisting the help of Yamaha to develop some cellphones that double as musical instruments. That includes the self-explanatory "Strings for fingers" and "Sticks in the air" concepts pictured above, as well as the "Box to play" synth / scratch pad combo, the "Key to touch" foldable keyboard, the "Trio in your hand" scratch pad / sampler, and the "Band in my pocket" device, which accommodates a number of accessories to create instruments ranging from a harmonica to a trumpet. What's more, unlike some concept devices, KDDI actually had some working prototypes to show off, which you can check out in action in the video after the break (be sure to dig into the links below for some more pics and videos as well).

[Via textually.org, Trends in Japan]