Musical tone synthesizing apparatus for synthesizing a muscial tone of an acoustic musical instrument having a plurality of simultaneously excited tone generating elements

A musical tone synthesizing apparatus for synthesizing the sound of an acoustic musical instrument, said acoustic musical instrument being comprised of a plurality of tone generating elements and a tone generating operator for exciting at least one of said tone generating elements, thereby creating reciprocally propagating vibrations within said tone generating elements, said musical tone synthesizing apparatus comprising:

• (a) a plurality of closed loop circuits, each closed loop circuit comprising a plurality of delay means and having a delay interval required for a signal to traverse said closed loop circuit one time equal to the period of reciprocal propagation vibration in one of the tone generating element of said acoustic musical instrument;
• (b) memory means for storing the relation between the tone generating operator and the tone generating elements;
• (c) feedback means for supplying feedback data from at least one of the plurality of closed loop circuits;
• and
• (d) excitation means for creating excitation signals, wherein said excitation signals are generated in accordance with operational data and said feedback data and supplied to said plurality of closed loop circuits, such that said operational data correspond to operational data supplied to said tone generating operators in said acoustic musical instrument being simulated, and said excitation signals correspond to the excitation of said tone generating elements by said tone generating operators in said acoustic musical instrument.

A musical tone synthesizing apparatus for synthesizing musical tones comprising:

• (a) a plurality of closed loop circuits, each closed loop circuit including delay means having a delay interval corresponding to a pitch of one of said musical tones, wherein said delay interval is capable of being set to have a discrepancy from the delay interval of others of said plurality of closed loop circuits;
• (b) feedback means for supplying feedback data from at least one of the plurality of closed loop circuits;
• and
• (c) excitation means for creating excitation signals generated in accordance with operational data and said feedback data which are simultaneously supplied to said plurality of closed loop circuits.