Asuna is a pioneering Japanese sound artist set for this year’s Belfast International Arts Festival to perform his latest mind-bending live creation, 100 Keyboards. The project involves playing the same key on 100 battery-operated keyboards at once, building a sonic moiré effect which must be heard to be believed. Ahead of the shows, we caught up with Asuna to discuss the birth and genesis of project. 100 Keyboards takes place at The MAC across October 17-19. Go here to buy tickets. __ Take us back to before you devised the idea of 100 Keyboards. What creative activity led you to the…