Audio Processing Unit

The Audio Processing Unit (APU) consists of (at least):

• Sony SPC700
• S-DSP
• APU oscillator
• ARAM
• Stereo DAC
• Pre-Amplifier
• Filter Amplifier
• Post-Amplifier

Reference

• dashed line in Figure 2-22-1 on page 2-22-2 of Book I of the official Super Nintendo development manual