Abstract: An apparatus for controlling a musical tone in an electronic musical instrument which has a plurality of keys and a plurality of tone generation channels, the apparatus includes a detecting device for detecting a depression state of the plurality of keys, a counter for counting number of key which are simultaneously depressed when key depression is detected, an assigning device for assigning predetermined number of the tone generation channels to each of depressed keys so as to substantially stabilize number of entire assigned generation channels, in accordance with a counted value of the counter, a loudspeaker for generating tone signal from the predetermined number of tone generation channels assigned by the assigning device. In the apparatus, even if the number of keys to be depressed is changed, the number of tones to be simultaneously produced is not greatly changed.

Abstract: A musical tone generating apparatus comprises an excitation signal generator, a signal processing device and loop gain controller. The signal processing device is electrically connected in a closed feedback loop with the excitation signal generator, via a delay unit. The loop gain controller controls gain of said closed feedback loop according to a lapse of time.

Abstract: An electronic musical instrument having a keyboard, includes a plurality of keys, a plurality of musical tone signal generation systems, a touch detector for producing touch data representing a key touch accompanied by a key depression, a panel operation unit for setting a touch sensitivity representing a sensitivity with respect to a key touch for each of the musical tone signal generation systems, and a register unit for modifying the touch data in accordance with the touch sensitivity corresponding to each of the musical tone signal generation systems. Different tone groups are assigned to the musical tone signal generation systems, and a musical tone signal which has a tone color belonging to the corresponding musical tone group and a pitch corresponding to a key depression is produced from each of the musical tone signal generation systems. Each musical tone group includes at least two tone colors having a common attribute.