Electronic expression device for producing tremulant effect

An electronic expression device for producing a tremulant effct comprising:

• an input terminal to which an audio frequency signal is applied;
• a distributing circuit for converting said audio frequency signal into a plurality of signals having the same vector frequencies as those of said audio frequency signal and having a different phase from each other and having vectors which have amplitudes similar to said audio frequency signal and are increasingly different in phase from each other with an increase in the frequency of said audio frequency signal,
• a connecting means which connects said input terminal with said distributing means;
• a plurality of transmission channels at least one of which has a modulation means therein for modulating the input signal of said transmission channels by a modulation signal, the frequency of which is in a sub-audio frequency range, and for modulating the input signal of said at least one of said plurality of transmission channels with a modulation depth increasing as the frequency of said audio frequency signal increases and exceeding .+-. .pi./2 radians when the modulation is phase modulation and exceeding 100% when the modulation is amplitude modulation in the frequency range of said audio frequency signal;
• a plurality of connecting means which connect said distributing means with said transmission channels;
• and
• a coupling means coupled to said transmission channels for coupling output signals of said plurality of transmission channels with each other,
• whereby said distributing means distributes said audio frequency signal to said plurality of transmission channels, said modulating means modulates by said modulation signal, at least one of the plurality of transmission channels puts out an output signal which is modulated differently from other output signals of said plurality of transmission channels due to the modulation of said modulation means, and said coupling means couples the output signals from said plurality of transmission channels together in order to produce a final output signal, each vector of which fluctuates differently from the other vectors thereof and the pass-bands of at least two of said plurality of transmission channels coincide with each other at least partially.

An electronic expression device for producing a tremulant effect, comprising;

• an input terminal to which an audio frequency signal is applied;
• a distributing means of the phase splitter type composed of means for converting said audio frequency signal into a plurality of signals having vectors which have amplitudes similar to said audio frequency signal and phases increasingly different from each other with an increase in the frequency of said audio frequency signal;
• a connecting means which connects said input terminal with said distributing means of the phase splitter type;
• a plurality of transmission channels, at least one of which has an amplitude modulation means therein for modulating the input signal of said transmission channels by a modulation signal, the frequency of which is in a sub-audio frequency range, and for modulating the input signal of said at least one of said plurality of transmission channels with an amplitude modulation depth increasing as the frequency of said audio frequency signal increases and the pass-bands of at least two of said plurality of transmission channels at least partially coincide with each other;
• a plurality of connecting means which connect said distributing means of the phase splitter type with said transmission channels;
• and
• a coupling means coupled to said transmission channels for coupling output signals of said plurality of transmission channels with each other,
• whereby said distributing means distributes said plurality of signals to said plurality of transmission channels, said amplitude modulation means modulates by said modulation signal, at least one of a plurality of transmission channels puts out an output signal which is modulated differently from other output signals of said plurality of transmission channels due to said modulation means, and said coupling means couples the output signals from said plurality of transmission channels together in order to produce a final output signal, each vector of which fluctuates differently from the other vectors thereof.