Musical tone electronic synthesizer and method

A method of electronically synthesising a musical tone, comprising steps of:

• generating a waveform using a first waveform generating unit having an input and an output;
• supplying said output to an input of a processing means, wherein said processing means includes frequency doubling means;
• and
• supplying a proportion of an output of said processing means to said input of said first waveform generating unit.

Apparatus for electronically synthesising musical tones, comprising means for:

• generating a plurality of waveforms using waveform generating units having respective inputs and outputs, such that each of said inputs is arranged to receive a signal for phase modulating the waveform generated by its respective waveform generating unit;
• supplying a proportion of an output from a first waveform generating unit to an input of a second waveform generating unit;
• supplying a proportion of an output from said second waveform generating unit to an input of another waveform generating unit, whereby said plurality of waveform generating units form a chain, such that the input of said first waveform generating unit receives an output from the final waveform generating unit of said chain, thereby providing a degree of recursion;
• and
• supplying a plurality of said outputs to a processing means to produce a tone including harmonic sums and differences of frequencies produced by said recursion.

Apparatus for electronically synthesising a musical tone, comprising:

• a first waveform generating means having an input and an output;
• a processing means including frequency doubling means;
• first supplying means for supplying said output of said first generating means to an input of said processing means;
• and
• second supplying means for supplying a proportion of an output of said processing means to said input of said first waveform generating unit.