Wavetable synthesizer and operating method using a variable sampling rate approximation

A wavetable synthesizer comprising:

• a plurality of operationally-independent wavetable processors for simultaneously processing a plurality of samples;
• a sample storage coupled to the plurality of wavetable processors, the sample storage including a musical signal information storage derived according to a method of coding musical signals including:
• filtering a musical signal into a plurality of mutually disjoint frequency bands including a higher frequency band and a lower frequency band;
• sampling the higher frequency band at a first sampling rate for a first sample duration;
• sampling the lower frequency band at a second sampling rate for a second sample duration, the second sampling rate being lower than the first sampling rate and the second sample duration being longer than the first sample duration;
• and
• storing the sampled higher frequency band and an associated recreation parameter in a first storage and storing the sampled lower frequency band and an associated recreation parameter in a second storage;
• and
• an interpreter coupled to the plurality of wavetable processors and coupled to the sample storage, the interpreter for activating the plurality of wavetable processors to independently but simultaneously process the higher frequency band sample and the lower frequency band sample.

A wavetable synthesizer comprising:

• a plurality of operationally-independent wavetable processors for simultaneously processing a plurality of samples;
• a sample storage coupled to the plurality of wavetable processors, the sample storage including a musical signal information storage divided into a plurality of mutually disjoint frequency band samples including a higher frequency band sample and recreation parameter and a lower frequency band sample and recreation parameter, the higher frequency band sample being sampled at a high sampling rate and a low sample duration relative to the lower frequency band sample;
• and
• an interpreter coupled to the plurality of wavetable processors and coupled to the sample storage, the interpreter for activating the plurality of wavetable processors to independently but simultaneously process the higher frequency band sample and the lower frequency band sample.

A method of providing a wavetable synthesizer comprising the steps of:

• providing a plurality of operationally-independent wavetable processors for simultaneously processing a plurality of samples;
• providing a sample storage coupled to the plurality of wavetable processors, the sample storage including a musical signal information storage divided into a plurality of mutually disjoint frequency band samples including a higher frequency band sample and recreation parameter and a lower frequency band sample and recreation parameter, the higher frequency band sample being sampled at a high sampling rate and a low sample duration relative to the lower frequency band sample;
• and
• an interpreter coupled to the plurality of wavetable processors and coupled to the sample storage, the interpreter for activating the plurality of wavetable processors to independently but simultaneously process the higher frequency band sample and the lower frequency band sample.

A multimedia computer system comprising:

• a host processor;
• and
• a wavetable synthesizer coupled to the host processor, the wavetable synthesizer including:
• a plurality of operationally-independent wavetable processors for simultaneously processing a plurality of samples;
• a sample storage coupled to the plurality of wavetable processors, the sample storage including a musical signal information storage divided into a plurality of mutually disjoint frequency band samples including a higher frequency band sample and recreation parameter and a lower frequency band sample and recreation parameter, the higher frequency band sample being sampled at a high sampling rate and a low sample duration relative to the lower frequency band sample;
• and
• an interpreter coupled to the plurality of wavetable processors and coupled to the sample storage, the interpreter for activating the plurality of wavetable processors to independently but simultaneously process the higher frequency band sample and the lower frequency band sample.

A sound generating system comprising:

• a keyboard/controller;
• and
• a wavetable synthesizer coupled to the keyboard/controller, the wavetable synthesizer including:
• a plurality of operationally-independent wavetable processors for simultaneously processing a plurality of samples;
• a sample storage coupled to the plurality of wavetable processors, the sample storage including a musical signal information storage divided into a plurality of mutually disjoint frequency band samples including a higher frequency band sample and recreation parameter and a lower frequency band sample and recreation parameter, the higher frequency band sample being sampled at a high sampling rate and a low sample duration relative to the lower frequency band sample;
• and
• an interpreter coupled to the plurality of wavetable processors and coupled to the sample storage, the interpreter for activating the plurality of wavetable processors to independently but simultaneously process the higher frequency band sample and the lower frequency band sample.