MIDImorphosis 2 for iOS
Use an ordinary electric guitar as a MIDI controller. The app features a fast an accurate tuner, detailed analysis tools to understand the tone of your guitar, and a full featured tab editor.
The app can be downloaded from the App Store. For detailed information about the app, refer to the MIDImorphosis 2 User Manual.
MIDImorphosis uses a Fast Fourier Transform to analyze all the frequencies of an incoming audio signal. A guitar string vibrates at a base frequency (for example, 110hz for an A), as well as multiples of that base frequency (220hz, 330hz, 440hz, and so on). By using all of the frequency information, the app can detect pitch quickly and accurately.
The app displays all of the frequencies in a novel spiral format.