Why does the sound on my MBP...

[mrochester]

...Sound so much richer and deeper in MacOS in comparison to Windows?

 

[maflynn]

...Sound so much richer and deeper in MacOS in comparison to Windows?

Apple doesn't really provide decent drivers for windows.

 

[mrochester]

Apple doesn't really provide decent drivers for windows.

Do you know if there are any third party drivers for the sound card?

 

[snaky69]

Apple doesn't really provide decent drivers for windows.

There's a bit more to it than that, namely Mac OS uses Coreaudio whereas Windows use (IIRC) ASIO which are two different ways of decoding audio and may(or may not) affect sound.

I think this might be the culprit more than the driver itself.