Electronic music instrument

An electronic musical instrument comprising a plurality of waveshape generating means for generating waveshapes of musical tones;

• a plurality of keyswitches for a number of channels greater than the number of said waveshape generating means;
• assigning means coupled between said waveshape generating means and said keyswitches for assigning one of said plurality of waveshape generating means to generate a waveshape selected by said keyswitches;
• decay memory means coupled to said assigning means for memorizing the order of decays of the plurality of musical tones;
• and signal generating means coupled between said decay memory means and said assigning means for generating a pseudo-decay end signal so as to clear the assigned one of said assigning means and supplying said end signal to said decay memory so as to clear the first decayed waveshape memorized therein and to memorize again a new order of decays of the musical tones, when musical tones for a number of channels greater than the number of said waveshape generating means are selected by said keyswitches.

An electronic musical instrument comprising a plurality of tone selecting means which comprise a plurality of tablet switches and a plurality of draw-bar switches;

• a tablet assigner coupled to said tablet switches for changing the ON and OFF condition of said tablet switches into a first time division multiplex signal;
• a draw-bar assigner coupled to said draw-bar switches for changing the ON and OFF condition of said draw-bar switches into a second time division multiplex signal;
• a present control circuit coupled to said tablet assigner and said draw-bar assigner for selecting at least one group from the plurality of said tablet switches and said draw-bar switches;
• a tablet selection detector coupled to said tablet assigner for detecting a change in said first time division multiplex signal and for generating an output signal at that change;
• a draw-bar selection detector coupled to said draw-bar assigner for detecting a change in said second time division multiplex signal and for generating an output signal at that change;
• and waveshape calculating means coupled to said tablet selection detector and said draw-bar selection detector for calculating waveshapes of a signal to be provided as a musical tone according to said output signal from said tablet selection detector or from said draw-bar selection detector.

An electronic musical instrument comprising memory means for memorizing waveshapes of musical tones represented by digitally coded amplitudes at two or more than two sampled points of said waveshapes;

• clock signal generating means coupled to said memory means for generating clock signals with high frequencies corresponding to pitches of depressed keyswitches of said musical instrument;
• assigning means coupled to said memory means and said clock signal generating means for assigning one of said memory means and one of said clock signal generating means;
• reading means coupled to said memory means for repetitively reading out said memorized waveshape amplitudes of assigned memory means by said clock signals;
• converting means coupled to outputs of said memory means for converting said read out waveshape represented by digitally coded amplitudes to an analogue musical tone;
• envelope generating means comprising a capacitor-resistor network for generating an envelope waveshape which is an analog representation of an attack and decay of the musical tone;
• and multiplying means coupled to outputs of said memory means for multiplying said analog waveshape with said converted musical tone in accordance with actuation of said keyswitches.