PC-Engine, Turbografx, or both?

[Nazi NecroPhile]

And ignore the people telling you to get a Laseractive or Supergrafx.

Agreed.  Get a ShuttleGrafx.

[nat]

Also the NES can be modified to play famicom, and disk 
system games, with the extra sound chip.

I'd like to see that, do you have a link?

My friend has a NES with an FDS attached. I'm not sure how its done. I'm not sure what he means about the extra sound chip. This is a Konami thing basically, right?

I use a FDS on my NES2.  You just need a pin convertor, thats it.  THe FDS attaches to the cart port.   You can do it to the front loader, but you have to fiddlefuck with actual mods to get it to connect.   The cart connector + convertor won't fit in the front of a NES.

The extra sound chip in question, is the FM crap on the FDS.   Like look at Simons Quest FDS

Here's another good comparison:

The Famicom version of Castlevania 3 destroys the NES in the sound department.

What's interesting here, is to that to me, the "enhanced" Castlvania III soundtrack on the Famicom sounds like it would sound if it was run through the Turbo's soundchip.

[Samurai Ghost]

Yeah, you are right, it does! I wonder how the number of sound channels compare.

[Arkhan Asylum]

What's interesting here, is to that to me, the "enhanced" Castlvania III soundtrack on the Famicom sounds like it would sound if it was run through the Turbo's soundchip.

That's because Konami's special soundchip technology sounds similar to the PC Engine.  FDS games use the FDS's internal soundstuff, where Konami's carts sometimes have special sound chip excitement.

Check out any MSX games using their SCC chip:

Totally sounds like the PCE.  Konami is awesome.

I can't speak for the Famicom chip, but the SCC has 5 channels instead of 6 like PCE... and there is no stereo panning.  So, MSX people kinda envy our sound chip in that regard. 

[RegalSin]

Where did Konomi get all that sound doh from? Did they run a service hotel or something?

[TurboXray]

The vcr6 chip used for the CV3 japanese cart. It adds two pulse channels (which have 8 duty cycle settings VS NES/famcioms 4 duty cycles on the basic two pulse channels) and one sawtooth channel. Sounds fuller/more layered. Interesting that the sawtooth channel has no volume control (pulse channels do), but seeing as how the waveform is built up from the phase accumulator - you can just create smaller (in height) ramp to emulate volume (changing the P bits for each volume change). So all in all, adds three new channels to the NES/famicom existing 5.