My (highly simplified) take on Steve Mann's scheme: See: The Cybernetic Chordic Keyer: A simple low cost high performance multikeyer for wearable computers or

My (highly simplified) take on Steve Mann's scheme: See: The Cybernetic Chordic Keyer: A simple low cost high performance multikeyer for wearable computers or the like Steve Mann Pdf at http://wearcam.org/keyer http://wearcam.org/keyer