Electronic musical instrument with glide

Claim 1

An electronic musical instrument comprising: means for generating a key address code corresponding to a depressed key; a frequency information memory for storing basic frequency information corresponding to notes of respective keys and producing, upon receipt of said key address code, frequency information corresponding to said key address code; a glide code generator comprising a clock pulse generator, a counter for counting the clock pulses generated and producing a glide code output which progressively changes in value with the pulse count, and a glide controller for controlling the counting operation of said counter to perform counting during only a predetermined period of time; a glide information generator coupled to said glide code generator and responsive to the glide code output thereof for producing a glide information output which initially represents a value other than 1 and thereafter changes in equal increments in time step with said glide code output until it represents a value equal to 1; a multiplier coupled to said glide information generator and said frequency information memory for multiplying said glide information output with the basic frequency information produced by said frequency information memory; a frequency counter for receiving and cumulatively counting the multiplication results of said multiplier; and a musical tone waveshape memory for storing a desired musical tone waveshape which is read out by the output of said frequency counter.