CPU revisions do affect the sound quite a bit, I noticed that the Super Gameboy CPU handles the L command differently from the DMG CPU. Certain DMG's of mine will stutter and skip on tables in the noise channel. Some of them handle samples better than others. With a bit of investigation I bet I could figure out why. Recently I have been writing on a Gameboy Pocket since it behaves consistently and when cranked through a EQ-ing mixer I can make bass sound pretty close to the DMG's.

Use what works and sounds good to you. Most people won't notice or care. I am fine with anything as long as it sounds good in my setup and won't interrupt my workflow when I hop between consoles.

Yep. It would all sound detuned.
It would work, if you use a crystal twice as fast.
Then everything would be one octave higher.

A SGB crystal would make it just slightly faster without much benefit, and you'd have to patch the whole lsdj rom to get it all in tune.
Lots of work for not a lot of extra speed.

Hmm, would switching over the crystal aswell, make the gameboy detune?

Theoratically if you over clock your DMG at double speed, and play everything at half the bpm and one Octave lower, you would have better table handling.

I have one cpu-03 that the wav channel (especially samples) sounds absolutely atrocious on. It also does not play nice with ASM PCB mount pro sound.

The SGB is a tad bit faster because of the timing crystal... but you're only switching over the SGB CPU and not the SGB timing crystal.

Nope, it won't. It will just start faster, that's all.

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cpu-02 has an issue about sampling i think

i dunno, i've read numerous posts by the cleverest dudes saying that the SGB cpu isn't faster, it just boots quicker (i.e. no nintendo logo and "bading!")
or at least, that was my understanding of things!

But replacing it with a SGB CPU would.

LITTLE SOUND DISC LION

edit for jungle cats

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the DMG CPU revisions won't affect the ability to run tables. 

the revisions do affect the wav channel however.  not sure the particularities of this, other than this is where the differences are key to some people.  most avoid a -B CPU with a DMG-CPU-02 PCB layout.  i think thats the 'iffy' combo.

could be entirely wrong though!  imo, its all part of the equipment itself, the consoles which really fuck up the sound in some unexpected way are more of a gem to me even if its just sitting down trying to 'tame' them

there are none for dmgs. If you are concerned about tables, use a gameboy advance or sp.