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Document NR43 values freezing the channel #633

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avivace merged 1 commit into from
Oct 17, 2025
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Document NR43 values freezing the channel #633

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2 changes: 1 addition & 1 deletion src/Audio_Registers.md
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Expand Up @@ -402,7 +402,7 @@ This register allows controlling the way the amplitude is randomly switched.
- **Clock divider**: See the frequency formula below.
Note that <var>divider</var> = 0 is treated as <var>divider</var> = 0.5 instead.

The frequency at which the LFSR is clocked is <math><mfrac><mn>262144</mn><mrow><mi>divider</mi><mo>×</mo><msup><mn>2</mn><mi>shift</mi></msup></mrow></mfrac></math> Hz.
The frequency at which the LFSR is clocked is <math><mfrac><mn>262144</mn><mrow><mi>divider</mi><mo>×</mo><msup><mn>2</mn><mi>shift</mi></msup></mrow></mfrac></math> Hz, except that <var>shift</var> being equal to 14 or 15 stops the channel from being clocked entirely.

If the bit shifted out is a 0, the channel emits a 0; otherwise, it emits the volume selected in `NR42`.

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