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S-DSP/Noise
From SnesLab
Noise clock table
Hardware noise on the SNES is generated by a 15-bit Fibonacci linear feedback shift register. [1] Note that the noise sampling frequency is the perceived pitch (due to overtones) even though it is double (Nyquist) that of the fundamental.
| Value | Sampling Frequency | Pitch | Example |
|---|---|---|---|
| 00 | 0 Hz | off | |
| 01 | 16 Hz | C0 - 38¢ | |
| 02 | 21 Hz | E0 + 33¢ | |
| 03 | 25 Hz | G0 + 35¢ | |
| 04 | 31 Hz | B0 + 7¢ | |
| 05 | 42 Hz | E1 + 33¢ | |
| 06 | 50 Hz | G1 + 35¢ | |
| 07 | 63 Hz | B1 + 35¢ | |
| 08 | 83 Hz | E2 + 12¢ | |
| 09 | 100 Hz | G2 + 35¢ | |
| 0A | 125 Hz | B2 + 21¢ | |
| 0B | 167 Hz | E3 + 23¢ | |
| 0C | 200 Hz | G3 + 35¢ | |
| 0D | 250 Hz | B3 + 21¢ | |
| 0E | 333 Hz | E4 + 18¢ | |
| 0F | 400 Hz | G4 + 35¢ | |
| 10 | 500 Hz | B4 + 21¢ | |
| 11 | 667 Hz | E5 + 20¢ | |
| 12 | 800 Hz | G5 + 35¢ | |
| 13 | 1.0 kHz | B5 + 21¢ | |
| 14 | 1.3 kHz | E6 - 24¢ | |
| 15 | 1.6 kHz | G6 + 35¢ | |
| 16 | 2.0 kHz | B6 + 21¢ | |
| 17 | 2.7 kHz | E7 + 41¢ | |
| 18 | 3.2 kHz | G7 + 35¢ | |
| 19 | 4.0 kHz | B7 + 21¢ | |
| 1A | 5.3 kHz | E8 + 9¢ | |
| 1B | 6.4 kHz | G8 + 35¢ | |
| 1C | 8.0 kHz | B8 + 21¢ | |
| 1D | 10.7 kHz | E9 + 25¢ | |
| 1E | 16 kHz | B9 + 21¢ | |
| 1F | 32 kHz | B10 + 21¢ |