Glidepro has released Ethero 2 – a gestural MIDI controller for iOS.
The traditional Theremin is usually controlled without any physical contact, with the player using a hand to control the pitch and volume of the sound. Ethero 2 works by using the camera of an iOS device and gestures to MIDI notes.
Ethero 2 doesn’t capture position, as some Kinect-based MIDI projects have done. Instead, it senses variations in the light hitting the camera sensor, so moving your hand or other object in front of the camera will vary the pitch of the notes.
You can use the MIDI output of Ethero 2 via either the Camera Connection Kit, MIDI over WiFi or virtual ports to control apps on the same device.
- Choose front or back camera (if you have an iPhone 4 or iPod Touch 4G, or higher)
- Pick the octave. The lowest note (i.e. when there’s no light coming into the camera) will be start of the octave.
- Pick your own scale. There are presets for Major, Minor, Major Pentatonic and Minor Pentatonic scales, but you can pick any notes you like!
- Pick the key. As well as choosing the actual notes of the scale, choose the key.
- Calibration. Set up your device in its normal ‘un-used’ state and calibrate which sets the ambient level of light to the lowest note the app will play.
Ethero 2 is a free download in the App Store.