The app allows users to play the sounds of a prepared piano on their iPad. It features meticulously sampled sounds from a piano prepared with materials used by John Cage for his Sonatas and Interludes.
The app offers a tone generator with five tones and a tuner with three display modes. It includes twenty-three default temperaments and allows users to add their own, with easy selection between flats and sharps in meantone temperaments.
The app offers a chromatic instrument tuner, pitch pipe, and tuning fork. It features 268 unique temperaments and allows users to define a precise reference frequency.
