<p>A method and apparatus for establishing the volume level of a tone generator associated with a keyboard in which the tone generator will output a click tone when each key on the keyboard is actuated. In establishing the volume level of a click tone, the keyboard is put into a volume setting mode by the actuation of two key members of the keyboard. The subsequent actuation of each key member will produce a different volume level of the click tone. The actuating of a key member results in the storing of a count in a storage member. The storage member is then downcounted until it reaches zero. Upon reaching the count of zero, processing means generates a pulse train in which the pulse width is determined by the time it takes for the storage member to count down to zero.</p>
申请公布号
DE3675012(D1)
申请公布日期
1990.11.22
申请号
DE19863675012
申请日期
1986.08.15
申请人
NCR CORP., DAYTON, OHIO, US
发明人
SEEVERS, DANIEL;ROHULICH, JOHN, CAMBRIDGE, OH 43725, US