MACHINE

Super Famicom S-DSP

Rounder and closer to real instruments than the other three - every voice plays back a short recorded sample, not a waveform.

Digital output verified cycle-by-cycle

ITS VOICES

How it makes sound.

The Super Famicom's S-DSP has eight sample-based voices, each with its own pitch, volume and ADSR envelope, plus a built-in echo/reverb effect shared by the whole mix.

chipvoice assigns the eight voices across melody, chords, bass and drums, using a different sample for each role.

HEAR EVERY PRESET

Its instruments.

Every preset a user can pick for this chip - played as one fixed probe, measured, never typed by hand.

Melody

GM programs 0-95

Sample: mallet

Envelope

Spectrum

Attack: 4.5 ms
Decay: 646.5 ms
Release: 4.9 ms
Peak / RMS: -22.8 / -41.7 dBFS
Spectral centroid: 426 Hz
Noise vs. tone: tonal

GM programs 16-127

Sample: flute

Envelope

Spectrum

Attack: 13.5 ms
Decay: 633.1 ms
Release: 7.9 ms
Peak / RMS: -23.0 / -30.8 dBFS
Spectral centroid: 289 Hz
Noise vs. tone: tonal

GM programs 32-37

Sample: picked-bass

Envelope

Spectrum

Attack: 6 ms
Decay: 55.4 ms
Release: 6.4 ms
Peak / RMS: -23.0 / -38.4 dBFS
Spectral centroid: 300 Hz
Noise vs. tone: tonal

GM programs 38-39

Sample: synth-bass

Envelope

Spectrum

Attack: 4.5 ms
Decay: 642 ms
Release: 7.9 ms
Peak / RMS: -23.1 / -37.0 dBFS
Spectral centroid: 364 Hz
Noise vs. tone: tonal

GM programs 40-55

Sample: strings

Envelope

Spectrum

Attack: 28.4 ms
Decay: 116.7 ms
Release: 7.9 ms
Peak / RMS: -23.0 / -37.5 dBFS
Spectral centroid: 411 Hz
Noise vs. tone: tonal

GM programs 56-63

Sample: brass

Envelope

Spectrum

Attack: 9 ms
Decay: 136.2 ms
Release: 7.9 ms
Peak / RMS: -23.0 / -42.0 dBFS
Spectral centroid: 469 Hz
Noise vs. tone: tonal

GM programs 80-87

Sample: square

Envelope

Spectrum

Attack: 3 ms
Decay: 649.5 ms
Release: 9.4 ms
Peak / RMS: -24.2 / -28.8 dBFS
Spectral centroid: 376 Hz
Noise vs. tone: tonal

Chords

GM programs 0-95

Sample: mallet

Envelope

Spectrum

Attack: 6 ms
Decay: 642 ms
Release: 6.4 ms
Peak / RMS: -22.8 / -43.0 dBFS
Spectral centroid: 434 Hz
Noise vs. tone: tonal

GM programs 16-127

Sample: flute

Envelope

Spectrum

Attack: 15 ms
Decay: 633.1 ms
Release: 9.4 ms
Peak / RMS: -23.0 / -32.0 dBFS
Spectral centroid: 289 Hz
Noise vs. tone: tonal

GM programs 32-37

Sample: picked-bass

Envelope

Spectrum

Attack: 7.5 ms
Decay: 55.4 ms
Release: 6.4 ms
Peak / RMS: -23.0 / -39.6 dBFS
Spectral centroid: 302 Hz
Noise vs. tone: tonal

GM programs 38-39

Sample: synth-bass

Envelope

Spectrum

Attack: 6 ms
Decay: 642 ms
Release: 9.4 ms
Peak / RMS: -23.1 / -38.2 dBFS
Spectral centroid: 366 Hz
Noise vs. tone: tonal

GM programs 40-55

Sample: strings

Envelope

Spectrum

Attack: 29.9 ms
Decay: 116.7 ms
Release: 9.4 ms
Peak / RMS: -23.0 / -38.7 dBFS
Spectral centroid: 411 Hz
Noise vs. tone: tonal

GM programs 56-63

Sample: brass

Envelope

Spectrum

Attack: 10.5 ms
Decay: 136.2 ms
Release: 9.4 ms
Peak / RMS: -23.0 / -43.3 dBFS
Spectral centroid: 475 Hz
Noise vs. tone: tonal

GM programs 80-87

Sample: square

Envelope

Spectrum

Attack: 4.5 ms
Decay: 646.5 ms
Release: 10.9 ms
Peak / RMS: -24.2 / -30.0 dBFS
Spectral centroid: 376 Hz
Noise vs. tone: tonal

Bass

GM programs 0-127

Sample: picked-bass

Envelope

Spectrum

Attack: 7.5 ms
Decay: 56.9 ms
Release: 7.9 ms
Peak / RMS: -23.0 / -38.4 dBFS
Spectral centroid: 304 Hz
Noise vs. tone: tonal

GM programs 38-39

Sample: synth-bass

Envelope

Spectrum

Attack: 7.5 ms
Decay: 640.5 ms
Release: 10.9 ms
Peak / RMS: -23.1 / -37.0 dBFS
Spectral centroid: 368 Hz
Noise vs. tone: tonal

Drums

Kick

Sample: kick

Envelope

Spectrum

Attack: 9 ms
Decay: 630.1 ms
Release: 0.4 ms
Peak / RMS: -21.9 / -40.7 dBFS
Spectral centroid: 128 Hz
Noise vs. tone: tonal

Snare

Sample: snare

Envelope

Spectrum

Attack: 7.5 ms
Decay: 631.6 ms
Release: 0.4 ms
Peak / RMS: -24.9 / -49.9 dBFS
Spectral centroid: 1683 Hz
Noise vs. tone: tonal

Hi-hat

Sample: hat

Envelope

Spectrum

Attack: 10.5 ms
Decay: 628.6 ms
Release: 0.4 ms
Peak / RMS: -25.1 / -47.8 dBFS
Spectral centroid: 9331 Hz
Noise vs. tone: noisy

Open hi-hat

Sample: ohat

Envelope

Spectrum

Attack: 10.5 ms
Decay: 628.6 ms
Release: 0.4 ms
Peak / RMS: -25.1 / -43.8 dBFS
Spectral centroid: 9355 Hz
Noise vs. tone: noisy

The full instrument catalogue, every chip

HOW WE CHECK

Its evidence.

How closely this chip's emulation matches the real hardware, from the conformance harness that runs before each release.

Digital parity

Compared with snes_spc 0.9.0 (blargg): 100.0 % identical (29,081,600 of 29,081,600 cycles), 0 of 6 logs with any divergence.

First divergence: none, every measured cycle is identical.

Test ROMs

No community test ROM suite exists for this chip yet.

Analog stage

Not measured yet. This stage is a placeholder, not a result.

Driver coverage

The shipped driver reaches 4 of the chip's 8 voices.

Full sheet on GitHub ↗ · Every chip's accuracy