How to extract ADSRV out of a Rom? (SN76489, Master System)

ali3 · Post by **ali3** » Sat Apr 27, 2013 12:07 pm

Is there a way to get these Parameters?

I tried to import vgm in some trackers but it was not possible. maybe the vgm's don't have these information. But how can i get them?

thanks guys

Mamizou · Post by **Mamizou** » Sat Apr 27, 2013 6:34 pm

The SN76489 is just a simple PSG chip, it has no envelope generator. So no ADSR, mainly just frequency and volume.

If it's for the YM2413, I don't know any utilities for dumping patches for that offhand. Your best bet initially is just to open it up with a hex editor and looking for the sound and instrument data inside. Then again it does only allow one custom patch.

Chilly Willy · Post by **Chilly Willy** » Sat Apr 27, 2013 8:44 pm

The 2413 doesn't have patches - it has an instrument number. All settings are internal. If the instrument you want isn't one of the presets, the 2413 can't do it.

neologix · Post by **neologix** » Sat Apr 27, 2013 8:58 pm

Chilly Willy wrote:The 2413 doesn't have patches - it has an instrument number. All settings are internal. If the instrument you want isn't one of the presets, the 2413 can't do it.

Ehhhhhh, it kinda can. The SMS's YM2413 has space for a user-made preset, but only one and it's rather limited. Maxim's YM2413 doc has more details, but suffice it to say YM2413 user presets are probably only useful in FamiTracker's VRC7 support, zzo38's VGMCK, and maybe DefleMask (haven't used it in a while, so I don't know if it has YM2413 user instrument support).

ali3 · Post by **ali3** » Sun Apr 28, 2013 9:33 am

ok thanks guys

i did this with SN-EMU (vst) and can get close to the master system sound:

https://dl.dropboxusercontent.com/u/310 ... _style.mp3

Do you think it's good?

Chilly Willy · Post by **Chilly Willy** » Sun Apr 28, 2013 6:27 pm

neologix wrote:
Chilly Willy wrote:The 2413 doesn't have patches - it has an instrument number. All settings are internal. If the instrument you want isn't one of the presets, the 2413 can't do it.
Ehhhhhh, it kinda can. The SMS's YM2413 has space for a user-made preset, but only one and it's rather limited. Maxim's YM2413 doc has more details, but suffice it to say YM2413 user presets are probably only useful in FamiTracker's VRC7 support, zzo38's VGMCK, and maybe DefleMask (haven't used it in a while, so I don't know if it has YM2413 user instrument support).

Thanks for the info! Guess it's a bit better than I thought.