Add an Disable FM chip option in favor of classic music about provenance

[jasarien]

I'm afraid I'm not going to put this in. It's a pretty specific feature request and the effort would be mostly unjustified. If it gets more requests I'll reconsider.

[JoeMatt]

I'm starting to add in Core specific options so this should be doable now as a toggle. I'll re-open.

Pico drive supports PSG (note to self, allow selecting Pico Drive for Megadrive / Genesis / Sega CD / Mega CD / SMS).

Genesis-Plus added support in 1.7.5, though the project says we're on 1.7.1 I think we're actually on the latest and I forgot to change that info because I see PSG code in the project. I'll have to check this later, there's different version numbers up to 1.7.4 in various source files.

For Genesis-Plus there are some settings to look into too for HQ sound among other things, I have to check out what we're using.

From SDL config

config.psg_preamp     = 150;
 config.fm_preamp      = 100;
config.hq_fm          = 1;
config.hq_psg         = 1;

[albertdick]

I think most people in the world know Sega Master System games with PSG sound, so it should be an option to enable it.

[albertdick]

Very thanks for your effort and for reopening this issue!