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CPS1: gulunpa high-pitched noise continues (MiSTer) #504

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jtmiki opened this issue Jan 22, 2024 · 3 comments
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CPS1: gulunpa high-pitched noise continues (MiSTer) #504

jtmiki opened this issue Jan 22, 2024 · 3 comments
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core bug Something isn't working

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jtmiki commented Jan 22, 2024

CPS1: gulunpa high-pitched noise continues
commit: e444aef
@jtmiki jtmiki added the core bug Something isn't working label Jan 22, 2024
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jotego commented Jan 22, 2024

Trying older versions of JT51:

Not a problem of recent changes to JT51, apparently. MAME does not show this issue.

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jotego commented Jan 22, 2024 •
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imagen

Tone at 2465 Hz (period 405.6us)

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jotego commented Jan 22, 2024 •
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The noise comes from the PCM channel, even before the external pole filter, interpolator and also the internal interpolator in jt6295_acc.

imagen

@jotego jotego closed this as completed in 864cc62 Jan 23, 2024
jotego added a commit to jotego/jt6295 that referenced this issue Jan 23, 2024
@jotego
clipping fixed (see jotego/jtcores#504). Volume halved as a result (-…
7b6f04f 
…3dB)
@jotego jotego mentioned this issue Aug 2, 2024
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