only if you can find the sample in AIFF or WAV file format, mono, 44.1 KHz 16 bit.

The supplied ram is 1 MB, and you buy a simm expansion up to a maximum of 64MB in addition to this.

The sort of sample you are talking about would involve multisamples, and probably need a pro synth rather than the 9000pro?

There are yamaha boards you can add as expansion boards to the pro - PLG series. PLG150 PF is a yamaha piano board, I don't know if it has a Steinway but it has got plenty of additional acoustic samples. You need to listen for yourself...