Yamaha Super Intelligent Sound Processor

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Yamaha Super Intelligent Sound Processor
Designer: Yamaha
Introduction date: 1998

The Yamaha AICA Super Intelligent Sound Processor is a Yamaha sound processor created for the Sega Dreamcast in 1998, and also used in the Sega NAOMI, Sega NAOMI 2, Sega Hikaru and the Atomiswave.

The AICA has similar specifications to the Saturn Custom Sound Processor, albeit with a few differences, such as having twice the number of audio channels; no FM mode, and no EGHOLD; adding support to ADPCM; and a slightly more capable DSP.

Technical specifications

  • AICA clock rate: 67 MHz[1]
  • CPU core: ARM7 @ 45 MHz[2]
  • Performance: 32‑bit RISC instructions @ 40 MIPS (million instructions per second)
  • PCM: 64 simultaneous audio channels, 16‑bit depth, 48 kHz sampling rate[3][4]
  • Hardware ADPCM 4:1 decompression
  • XG MIDI support
  • 3D environment effects
  • DSP for reverb, chorus and other musical effects
  • RAM: 2 MB (Dreamcast), 8 MB (NAOMI)
  • Middleware: Audio compression, voice recognition[1]

References

  1. ↑ 1.0 1.1 htt (Wayback Machine: 2000-08-23 20:47)
  2. ↑ http://www.segatech.com/technical/saturnspecs/
  3. ↑ File:DreamcastDevBoxSystemArchitecture.pdf
  4. ↑ http://segatech.com/technical/overview/index.html
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