Soundchip suggestion - SunPlus μnSP (SPG2xxx) SPU

[beanieaxolotl]

I would love to see support for the SunPlus SPG2xxx sound chip, as I think it may be really interesting to play around with. From what I have seen, it is basically a PCM chip with 16 channels (double that of the SNES), and IMA ADPCM support (used for the Vtech V.Smile and plug-n'-play TV game systems).

One quirk that interests me is that there is no loop end point for a looped sample. You can only set a loop start point, and that's it. The "loop end" is just the end of the sample.

Link to an overview I found of the μnSP SPU:
//
EDIT: New links:

https://vtech.pulkomandy.tk/doku.php?id=spu
https://github.com/mamedev/mame/blob/master/src/devices/machine/spg2xx_audio.cpp

[tildearrow]

Hardware envelopes seem interesting as well.

Missing loop end is common in sample chips.

[blockhole72]

Do the SGP2xxx!!

[blockhole72]

And do it in 0.6.4.

[beanieaxolotl]

Missing loop end is common in sample chips.

Oh, wait, I didn't realize (still interesting tho)

I remember finding this slightly more detailed write-up of the SPU at https://vtech.pulkomandy.tk/doku.php?id=sound

[ghost]

Sounds interesting.

[The-Beesh-Spweesh]

Link to an overview I found of the μnSP SPU: https://github.com/MooglyGuy/unsp/blob/master/spu/overview.md

Please don't link that document. It's very outdated. Honestly you should give a look at the MAME source code (but AFAIK, not even MAME has fully-accurate SPG sound).

[beanieaxolotl]

Oh, sorry. I just updated it to not include the doc; thanks for reminding me