The highly-integrated architecture of the ATSAM9703 device combines a specialized high-performance RISC digital signal processor and a general-purpose 16-bit CISC control processor on a single chip. An on-chip memory management unit allows the digital signal processor and the control processor to share external ROM and RAM devices. The ROM bus width should be 16 bits, while the SRAM can be selected to be 8 or 16 bits wide. When using an 8-bit SRAM, fast type (static cache) should be selected as two SRAM cycles will be done in one ROM cycle duration. Running at 300 million operations per second (MOPS), the digital signal processor supports high-quality PCM synthesis as well as most important functions like reverb, chorus, surround effect and equalizer. By adding an additional stereo DAC, four- channel audio surround can be obtained as well. Computer Karaoke manufacturers will enjoy the built-in high-quality dual-microphone echo processing.