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Namco WSG / Namco C15 / Namco C30

a family of wavetable synth sound chips used by Namco in their arcade machines (Pac-Man and later). waveforms are 4-bit, with 32-byte sample length.

everything starts with Namco WSG, which is a simple 3-channel wavetable with no extra frills. C15 is a much more advanced sound source with 8 channels, and C30 adds stereo output and noise mode.

effects

  • 10xx: change waveform.
  • 11xx: toggle noise mode. warning: only on C30.

info

this chip uses the Namco WSG instrument editor.

chip config

the following options are available in the Chip Manager window:

  • Waveform storage mode: selects whether RAM or ROM is connected to the chip.
    • RAM: connects RAM for unlimited waves.
    • ROM: connects ROM. authentic to hardware, but only the first 8 waves are loaded.

Namco C30 does not have the aforementioned option as it always uses RAM for waveforms. instead, it has this option:

  • Compatible noise frequencies: for compatibility with old Furnace.