vgm-conv icon indicating copy to clipboard operation
vgm-conv copied to clipboard

Published 20 hours ago • verified publisher icon digital-sound-antiques

NGP to AY8910 noise frequency conversion error

Open denjhang opened this issue 3 years ago • 4 comments

截图未命名0817193948 截图未命名0817193832 The NGP noise frequency seems to be a little different from the normal SN76489.

denjhang avatar Aug 17 '21 11:08 denjhang

The corresponding AY8910 noise value should be 31, 15, 7, 0. But currently it is always 0.

denjhang avatar Aug 17 '21 11:08 denjhang

Does this issue only occur on NGP conversion? Is it okay for other SN76489 vgms?

okaxaki avatar Aug 17 '21 12:08 okaxaki

only occur on NGP conversion

denjhang avatar Aug 17 '21 17:08 denjhang

NGP mode is realized with VGM's dual-chip support. Since vgm-conv does not support dual-chip, the conversion result only based only on the primary chip. I guess your VGM specifies the noise frequency in the secondary chip stream.

okaxaki avatar Aug 18 '21 00:08 okaxaki