Musical tone synthesizing apparatus

A musical tone synthesizing apparatus for synthesizing the musical tones simulating an acoustic musical instrument of the type comprising a vibrating element and an operator for exciting a part of said vibrating element to thereby generate reciprocally propagating vibrations, said operator and vibrating element being determinative of pitch of said musical tone, said musical tone synthesizing apparatus comprising:

• operating means, corresponding to said operator, for providing operational data including data indicative of pitch;
• a closed-loop circuit comprising at least two delay means each having a variable delay time, the sum of said delay times corresponding to a period of said reciprocally propagating vibration;
• excitation means, responsive to the operational data, for generating an excitation signal corresponding to an excitation vibration imparted to said vibrating element and for supplying said excitation signal to said delay means;
• delay period memory means for providing a delay period, indicative of said sum of said delay times, of said delay means in correspondence with pitch data of said operational data;
• and
• delay time ratio memory means for storing a ratio of said delay times, dividing said delay period into said delay times in accordance with said delay ratio, and supplying said delay times to said delay means.