Monolithic PC audio circuit

A monolithic audio processing integrated circuit for a host computer system, said host computer system including a central processor, system memory and a processor-accessible bus for transferring data, control and address signals within said host computer system, said monolithic audio processing integrated circuit comprising:

• a system control module which includes:
• an interface to a bus accessible by said host processor;
• and
• a plurality of integrated circuit control registers for storing data, control and status bits which reflect or control the status of various operations performed by said integrated circuit;
• a coding and decoding module for providing analog-to-digital and digital-to-analog signal conversion;
• said coding and decoding module further comprising:
• analog input and analog output circuits having input and output terminals for receiving and transmitting, respectively, analog signals from and to external sources and destinations;
• and
• digital audio input and digital audio output circuits having input and output terminals for receiving and transmitting, respectively, digital audio data from and to said system control module, and from and to external sources and destinations;
• and
• a digital wavetable audio synthesizer module for generating digital audio signals, said synthesizer module further comprising:
• a digital signal transfer circuit for transferring synthesized digital audio data to said coding and decoding module;
• and
• a data input circuit for acquiring digital audio data from an external source.