APU

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The MCPX contains an APU (Audio Processing Engine).


  • SGE = Scatter Gather Entry
  • PRD = Physical Resource Descriptor (Same thing as SGE?!)

Global Processor (GP)

Encode Processor (EP)

Voice Processor (VP)

Voice lists

  • 2D
  • 3D
  • MP

Voice structure

This is 0x80 bytes

Pitch calculation

p = 4096 * log2(f / 48000)
f = pow2(p / 4096) * 48000

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