Electrical musical instrument

In an electronic musical instrument, the combination of first generator means for supplying tone signals;

• key means actuable to generate additional signals of variable duration;
• second generatore means for supplying envelope control signals whose intensity is a function of the duration of the additional signals;
• and control means for modulating the amplitude of the tone signals as a function of the characteristics of the envelope control signals, said control means including terminal means, and analog switch means having a first input for the envelope control signals, a second input for the tone signals and an output for modulated tone signals connected with said terminal means, said control means further including a main branch which comprises an amplifier having an inverting input connected with said output, and said control means also including a bypass branch between said second generator means and said terminal means connected with said inverting input, said bypass branch comprising means for superimposing upon the modulated tone signals further signals whose magnitude is half that of the modulated tone signals.

In an electronic musical instrument, the combination of first generator means for supplying tone signals;

• key means actuable to generate additional signals of variable duration;
• second generator means for supplying envelope control signals whose intensity is a function of the duration of the additional signals;
• and control means for modulating the amplitude of the tone signals as a function of the characteristics of the envelope control signals, said control means including analog switch means having a first input for the envelope control signals, a second input for the tone signals and an output for modulated tone signals, and said control means further including a terminal, and a first main branch connecting said output with said terminal to transmit modulated tone signals to said terminal, said control means also including a second main branch connecting said output with said terminal, and said second main branch comprising means for transmitting modulated signals from said output to said terminal when the amplitude of the modulated tone signals exceeds a predetermined value, said transmitting means including a high-pass filter.

In an electronic musical instrument, the combination of first generator means for supplying tone signals;

• a plurality of key means actuable to generate additional signals of variable duration;
• a second generator means for each of said key means operative to supply envelope control signals whose intensity is a function of the duration of the additional signals;
• and control means for modulating the amplitudes of the tone signals as a function of the characteristics of the envelope control signals, said control means including an analog switch means for each of said second generator means having a first input for the envelope control signals, a second input for the tone signals and an output for modulated tone signals, and said control means also including first and second main branches and a bypass branch, each of said branches comprising a discrete amplifier having an input, and said control means further including first and second bus bars connecting said inputs of said amplifiers in said main branches with all of said outputs of said analog switch means, said control means additionally including a third bus bar connecting said input of said amplifier in said bypass branch with all of said second generator means.