Electronic musical instrument capable of varying a tone synthesis operation algorithm

An electronic musical instrument comprising:

• a plurality of operation units respectively performing a predetermined waveform generation operation using a phase signal or a waveform signal applied to one or more inputs thereof as a parameter;
• setting means for variably setting a combination of input and output connections between said respective operation units;
• connection switching means for switching connections between said respective operations units in response to the combination of connections set by said setting means, and
• which further comprises output inhibit selection means for inhibiting an output signal of an operation unit selected by said selection means.

An electronic musical instrument comprising:

• a plurality of operation units respectively performing a predetermined waveform generation operation usng a phase signal of a waveform signal applied to one or more inputs thereof as a parameter;
• setting means for variably setting a combination of input and output connections between said respective operations units;
• connection switching means for switching connections between said respective operation units in response to the combination of connections set by said setting means;
• and
• which further comprises detection means for detecting, responsive to the combination of connections set by said setting means, the number of operation units which finally provide tone signals, and means for automatically adjusting, responsive to the number which has been detected by said detection means, the levels of output signals of said operation units which finally provide tone signals.

An electronic musical instrument comprising:

• phase generation means for generating phase data which changes at a rate corresponding to the frequency of a note to be generated;
• a plurality of operation units having first and second inputs and performing a predetermined waveform generation operation in response to signals applied to said first and second inputs, at least said first input receiving the phase angle data generated by said phase generation means;
• control signal generation means generating signals for controlling the levels of output signals of said respective operation units as a function changing with time which initiates from start of sounding of a tone and supplying these signals to said respective operation units;
• first setting means for variably setting a combination of input and output connections between said respective operation units;
• second setting means for variably setting parameters of the control signal function generated by said control signal generation means in response to said respective operation units;
• and
• connection switching means for respectively switching a state of connection between said second input and the output of said respective operation units in accordance with the combination of connections set by said first setting means.

An electronic musical instrument comprising:

• tone pitch designating means for designating a pitch of a tone to be produced and for producing phase angle information corresponding to said designated pitch;
• tone signal generating means for generating, on receipt of said phase angle information, a tone signal relative to said tone pitch;
• said tone signal generating means comprising a set of algorithm performing units arbitrarily selectably interconnectable for performing a plurality of sequences of operation algorithms, each individual algorithm performing unit providing respectively a modulation operation of a carrier signal having a phase angle representative of said phase angle information in accordance with a modulation signal and providing a modulated carrier signal as the result of said modulation operation;
• algorithm sequence designating means for arbitrarily designating an interconnection scheme between the units in said set of algorithm performing units, thereby to implement a corresponding selected algorithm sequence of said operation algorithms by utilizing, for the modulation signal of at least one operation algorithm said tone signal, the modulated carrier signal provided by said at least one algorithm performing unit or by another algorithm performing unit, or the modulated carrier signals of more than one other algorithm performing unit.