real bout fatal fury sound issue?

[xenyou]

I don't exactly know if this is a issue but I'll report it.

it seems that the volume balance of Mai's BGM is weird.

mister fpga (neogeo core)

some sound is little loud.

https://youtu.be/6KXYI3J-U8U?si=tVByWrn0I4Xd9vJc&t=58

mvs (MV-1B. real hardware of mine)

not loud.

https://youtu.be/cKeXD93-wyc?si=7Wq3Z7kt4hV-oHwS&t=84

mvs (famous game center of japan)

not loud.

https://www.youtube.com/watch?v=X245vhXOwTs&t=3124s

ACA Neogeo

this one is similar with mister's one. the same sound is little loud.

https://youtu.be/pJbmZhXB5JI?si=EXx7NCGANj3Wlc2s&t=58

Does it depend on the model of MVS?

[Toryalai1]

Yeah I can confirm this issue. There is a sound channel that is too loud.

[Toryalai1]

We finally have some data thanks to Artemio and team. I'm just going to paste in information from him and maybe developers can jump in.

AES vs AES:
You can see that accoring to measurement ADPCM-A is too low (or the rest are too loud if you are relative to that) and that curves are filtered differently
with ADPCM-B too loud in the high end

MVS 1FS vs Mister:
FM is high by about 3db, and ADPCM B is high by about 1.7 db

Here are the recordings:
https://drive.google.com/drive/folders/1gZP5rWWdjabl7LnLB3SplF2QpiX_uHxa

@paulb-nl, I know that you did some fixing to the audio before, do you think this would be enough information? :)