Methods and apparatus for controlling user access to a computing environment are provided. The input voiced pitch name information is subjected to speech recognition, and pitch name data, which matches data representing the input pitch name, is selected from a plurality of previously cataloged pitch name data Next, the pitch name based on the selected one pitch name data is displayed as a character on a display screen, and the note duration of the pitch name is keyed. A shallow p-well is formed under the blue pixel sensor cell to decrease the red and green responses, while a shallow retrograde p-well is formed below the green pixel sensor cell to increase the green response and decrease the red response.