mr/nl_drlibling.cpp: Fixed the PARATA netlist and optimized performance

[aovestdipaperino]

@cuavas
I finally found a way to have enough perf to emulate the PARATA netlist correctly.
After regenerating the static solvers, this one works quite well.
Possible improvement: put more sounds behind OPTIMIZE_FRONTIERS, I couldn't figure out how to do it.

With a little bit of effort, this can make the 0.264 release.

P.S. of course static solvers will need to be regenerated.

[aovestdipaperino]

@cuavas gentle ping.

[aovestdipaperino]

Adding a chart comparing the two shapes

[aovestdipaperino]

Video proof that no pac-man sound comes out when players move (the video on youtube comes from a weird bootleg or different ROM)

HAPPY EASTER TO WHOEVER CELEBRATES IT.

[aovestdipaperino]

Further improvements: put all netlists behind FRONTIER. This gives enough performance to play the parata audio and further improvements.
I left only the TOS circuitry (with a conditional flag) in the main netlist since a clicking noise can be heard when put into a separate Submodel behind FRONTIER.
Please take another look as this is very close to be done.

[aovestdipaperino]

One more performance improvement, using an idea from @cuavas description of the second JFET (isolation purposes).
By using FRONTIER the second JFET is redundant and can be replaced by two DIODES in order to reduce the voltage. This returns an incredible 60% performance improvement when generating this sound while not altering the output in a distinguishable way.
Below in red the real circuit, in green FRONTIER + two diodes instead of the JFET.

[aovestdipaperino]

@rb6502 gentle ping

[rb6502]

I'm not super qualified to review netlist code beyond the obvious style stuff. That all looks fine, and I like that you've got the graphs to show the improved accuracy, but I'm going to give @cuavas a day or two to recover from the release and take a look before I commit this.

I don't know if we've got any other drivers that could use some netlist work off the top of my head, but I'd love to see you do more in this area.

[aovestdipaperino]

@rb6502 more than willing to help with other netlists needing work, but kind of hard for me if the feedback loop takes really long since I have the attention span of a gold fish.
I will ping you in a week if there is no movement, this could have made release .265, I would be happy to see it in .266 at least.

[aovestdipaperino]

Hi @rb6502 pinging back.
Send me the other netlists my way when done