Assigner for electronic musical instrument

An assigner for an electronic musical instrument, which is provided with keyboard's keys comprising:

• a micro processor, an interruption control circuit connected to control interruption cycles at a predetermined period in the operation of said keyboard's keys;
• a microprogram in which, during said interruption cycles of said interruption control circuit, each present keyboard status is calculated and on-off information on the present keyboard's key is calculated by comparing the calculated present keyboard status and the keyboard status one cycle earlier;
• said microprocessor having an arithmetic section connected to be operated by said microprogram;
• and memory means for storing said on-off information of said keyboard's keys.

An assigner for assigning tone production to an appropriate channel or channels in an electronic musical instrument having a plurality of keys and a plurality of tone controlling members for designating qualities of tones to be produced respectively, said assigner comprising:

• program memory means having a program which defines sequence of processing regarding tone production assignment step by step;
• data memory means connected to store first data corresponding to said plurality of keys and second data corresponding to said plurality of tone controlling members respectively;
• channel memory means having memory positions which correspond to a plurality of tone production channels respectively, the number of said tone production channels being less than the number of said plurality of keys, said channel memory means having a plurality of channels, and
• microprocessor means coupled to said program memory means, data memory means, and channel memory means and keys and tone controlling members to read out said program and assign first data and second data corresponding to a newly depressed key and newly operated tone controlling member or members respectively among said stored first data and said second data to available one or more of said tone production channels in accordance with said program, said microprocessor means being connected to assign said first data corresponding to said newly depressed key and second data corresponding to said newly operated tone controlling member or members in such a manner that each of said second data is assigned to the available one of said tone production channels together with said first data.

An assigner for assigning a tone production to an appropriate channel or channels in an electronic musical instrument having a plurality of keys, said assigner comprising:

• program memory means for storing a program which defines a sequence of processing regarding a tone production assignment step by step;
• channel memory means having memory positions which correspond to tone production channels respectively, the number of said tone production channels being smaller than the number of said plurality of keys, said channel memory means having a plurality of channels;
• and
• microprocessor means coupled to said program memory means, and channel memory means and keys to read out said program and to assign data corresponding to a newly depressed key among said plurality of keys to an available one or more of said tone production channels in accordance with said program.