Patent ID: 6538189
Filing Date: 2003-03-25
Classification: G10H

Abstract:
In a wind controller of the type adapted for use with a music synthesizer to produce a sequence of musical notes, said controller comprising a control instrument having a body member with a plurality of keys mounted thereon, each of said keys being manually movable between a released position and a held position, at least some of said notes requiring a combination of two or more of said keys to be in said held position at the same time, said wind controller also comprising a plurality of key position sensors, each sensor being associated with a different one of said keys for producing a logic signal which represents the position of its associated key, the improvement wherein:each said key position sensor comprises switching means for producing a tristate logic signal having a first state when its associated key is in said released position, having a second state when its associated key is in said held position, and having a third state when its associated key is in transition between said released and held positions, a key map memory coupled with said key position sensors for storing said tristate logic signals for application co said music synthesizer, and first logic means coupled with each of said key position sensors for producing a disenable signal when the tristate logic signal of any key is in said third state for disenabling the application of said tristate logic signals in said key map memory to said synthesizer, and for enabling said application when the tristate logic signal of no key is in said third state, whereby glitches are avoided in said sequence of musical notes.