What Key is a key detection app that determines the musical key of a song in real time. Using the pitch detection algorithm from Pitch to Note, What Key matches the notes being played to major, minor, blues, bebop (jazz) and other scales in all keys, picking the scale and key with the best match. What Key is a universal app that runs on iPod Touch, iPhone, and iPad.What Key works best on music with minimal percussion tuned to A4=440 Hz.
What's new in version 3.5
iOS 7 bug fixes.
ReleaseOctober 7, 2013
Date AddedOctober 7, 2013
Additional RequirementsCompatible with iPod Touch (3rd generation or later, iPhone 3Gs, iPhone 4, iPad. iTunes account required.